TWI817596B - Integrated loudspeaker device having an acoustic chamber containing sound adsorber material - Google Patents

Abstract

An acoustic device having a housing and an acoustic transducer is disclosed. The housing has a transducer space for the acoustic transducer, and a back volume space. The back volume is filled with a sound adsorber material. The sound adsorber material in the back volume space is configured to virtually increase the size of the back volume space, and shift the resonant frequency of the back volume space. The acoustic chamber for the acoustic transducer and the sound adsorber material is integral to the split-shell housing of the acoustic device. The sound adsorber material is retained in a portion of the acoustic chamber by an acoustically permeable material that facilitates gas exchange within the back volume space, and between the sound adsorber material and the transducer space. The acoustically permeable material is configured in different arrangements to facilitate the gas exchange.

Description

Integrated loudspeaker device with an acoustic chamber containing sound-absorbing material

The present invention is in the field of acoustic devices and in particular the invention relates to a small loudspeaker device having a sound absorbing material integrated into a rear volume portion of the housing of the loudspeaker device.

In acoustic technology, it is known to place a sound-absorbing material in a rear volume of a loudspeaker device in order to practically acoustically enlarge the rear volume. In a loudspeaker device with a substantially smaller rear volume, a sound-absorbing material reduces the resonant frequency of the loudspeaker device to a value similar to that of a loudspeaker device with a substantially larger rear volume. More specifically, sound-absorbing materials placed in the rear volume of a loudspeaker device improve its acoustic characteristics, such as broadband performance and the apparent acoustic volume of the loudspeaker. Examples of sound-absorbing materials include zeolite materials, zeolite-based materials, silicon dioxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₃ ), magnesium oxide (MgO), iron tetroxide (Fe ₃ O ₄ ), molecular sieves, fullerene, carbon nanotubes and activated carbon or charcoal. Unlike activated carbon, zeolite materials and zeolite-based materials are electrically isolated. Because zeolite materials and zeolite-based materials are not electrically conductive, zeolite materials and zeolite-based materials do not affect electrical components (e.g., antennas, batteries, internal electronics, etc.) incorporated into a device of a speaker device having such a sound-absorbing material. . Furthermore, the non-conductive zeolite material or zeolite-based material will not cause a short circuit if the non-conductive zeolite material or zeolite-based material becomes relaxed within the device. Additionally, encapsulation of zeolite materials and zeolite-based materials is much easier than in the case of activated carbon braids. A problem arises when sound-absorbing material consisting of or at least including powder, loose particles, loose particles is inserted or placed in the rear volume of the loudspeaker device. In addition, the rear volume of a small speaker (such as a speaker device placed in a mobile phone, a headset, etc.) is often constrained by other circuit components in the immediate physical area surrounding the speaker, and sometimes the shape of the rear volume is complex and Does not meet acoustic requirements. One conventional technique uses a tube of sound-absorbing material wrapped in it, but these tubes usually do not fit well in a rear volume that has a complex shape. Inserting sound-absorbing material directly into the rear volume can be difficult in practice. Additionally, if the sound-absorbing material is not securely encapsulated, it can enter the speaker device and various components of the handheld device in which the speaker device is used, and, therefore, damage the speaker device or the handheld device that includes the speaker device as a component. U.S. Application No. 13/818,374, the entire contents of which are incorporated herein by reference, discloses an audio system including an electroacoustic sensor or one having a resonant volume formed to improve the quality of the sound emitted. Speaker enclosure. The audio system disclosed in Application No. 13/818,374 includes a zeolite particulate material or a substantially spherical zeolite particulate material filling a portion of the resonant volume of a loudspeaker. Zeolite material is a sound-absorbing material that, depending on the formulation of the material, results in an actual acoustic expansion of the volume of the resonant space by a factor of 1.5 or greater. Therefore, the volume of a speaker enclosure that includes zeolite material can be smaller compared to an enclosure of an air-filled speaker. Encapsulation of zeolite-based materials for use as a sound absorber within the back volume of a small speaker, such as the type commonly found in today's handheld consumer electronics devices, has been challenging. Although not electrically destructive, the zeolite material disclosed in Application No. 13/818,374 can interfere with the proper operation of a small speaker and other components within a handheld consumer electronics device if not properly contained within the device. Furthermore, due to the often restricted space within the volume behind a small loudspeaker, gas exchange can be resisted and the efficiency of zeolite-based sound absorbers can be reduced by design constraints. Although the volume behind the small loudspeaker can completely fill a zeolite-based absorber, the resonant frequency shift disclosed in Application No. 13/818,374 occurs as long as a limited amount of the sound-absorbing surface area is exposed to the pressure changes caused by the movement of the acoustic sensor. will be restricted.

The disclosed invention relates to housing components of a mobile device, such as a speaker, which when joined form an integrated acoustic chamber for an acoustic sensor. The acoustic chamber has a rear volume, a front volume and a volume occupied by the acoustic sensor. In the volume behind the acoustic chamber, a large amount of sound-absorbing material is placed within a cavity created by the walls of the acoustic chamber. The chamber containing the sound-absorbing material is sealed from the rest of the acoustic chamber using a breathable material with low sound resistance. The breathable material retains the sound-absorbing material within its designated chamber while allowing gas exchange between the sound-absorbing material and the remainder of the acoustic chamber. An embodiment of a housing for a mobile device according to the present invention may include: a shield. In this embodiment, the shield may include: a chamber wall defining a substantially sealed acoustic chamber; an acoustic sensor (such as a speaker or receiver) disposed within the acoustic chamber; a sound port acoustically coupled to the acoustic sensor; an interior chamber wall disposed within the acoustic chamber and defining a rear volume; and a large amount of sound-absorbing materials placed in the rear volume. In this embodiment, a breathable member is mechanically coupled to the chamber wall and the interior chamber wall and encloses the chamber wall and the interior chamber wall to form a barrier for retaining the sound absorbing material therein. A defined volume, the defined volume and the acoustic sensor are arranged side by side in the acoustic chamber, and the breathable member is not facing the acoustic sensor. The breathable member of this embodiment has low sound resistance and may include one or more of a cashmere material or a mesh material, and the pore size of the material of the breathable member is adapted to be smaller than the size of the sound-absorbing particles. The breathable member is mechanically attached to the chamber wall and the interior chamber wall by gluing, crimping, stamping, embossing, heat sealing or ultrasonic welding. This embodiment may further include a chamber liner disposed on the top portion of the chamber wall, wherein a thickness of the chamber liner determines the magnitude of the restriction by which gas exchange is facilitated. Additionally, this embodiment may further include a sound port gasket interposed between the acoustic sensor and the sound port disposed in the shroud, wherein the sound port gasket seals the front volume from the rear volume . In this embodiment, in the acoustic chamber, the rear volume is partially filled with a zeolite-based material having substantially spherical sound-absorbing particles with a minimum diameter of at least 300 microns. Another embodiment of a housing for a mobile device may include: a first housing component including an acoustic sensor; and a second housing component mechanically coupled to the first housing component to form the The casing of the mobile device. In this embodiment, the second housing element may include: a continuous vertical element for defining a substantially sealed acoustic chamber; an audio port positioned to be acoustically coupled to the acoustic sensor (e.g., an a loudspeaker or a receiver) in a sensor space; an internal vertical element placed in the acoustic chamber and intersecting the continuous vertical element to define a rear volume; a plurality of sound-absorbing particles placed in the rear volume inside; and a sound-permeable material mechanically coupled to the continuous vertical element and the inner vertical element, and enclosed with the continuous vertical element and the inner vertical element to form a defined space for retaining the sound-absorbing particles within ; The defined space and the acoustic sensor are arranged side by side in the acoustic chamber, and the breathable material is not facing the acoustic sensor. In this embodiment, the acoustic sensor occupies the sensor space when the first housing element and the second housing element are coupled together. In this embodiment, the rear volume portion of the acoustic chamber is partially filled with substantially spherical particles having a minimum diameter of at least 200 microns (or in another embodiment, a minimum diameter of at least 350 microns) A zeolite-based sound-absorbing particle. This embodiment may include a chamber liner disposed at the top portion of the continuous vertical element, wherein a thickness of the chamber liner determines the size of the restriction by which gas exchange is facilitated. In this embodiment, the acoustically transparent material may be mechanically attached to the continuous vertical elements and the inner vertical elements by gluing or ultrasonic welding. In a variation of this embodiment, the inner vertical element may include an opening configured to facilitate gas exchange of the sound-absorbing particles, wherein the opening may include a feature substantially the same as mechanically coupled to the continuous vertical element. and a material that is acoustically resistant to the sound-transmissive material of the inner vertical element, and the material disposed in the opening of the inner vertical element may include one or more of a cashmere material or a mesh material. In a further variation, the inner vertical element may include an opening configured to facilitate gas exchange of the sound-absorbing particles, wherein the opening may include a structure other than mechanically coupled to the continuous vertical element and the inner vertical element. The sound-transmitting material is a sound-resistance material. In some embodiments, the material disposed in the opening of the interior vertical element may include a breathable material, which may include sound-absorbing particles sized to retain the sound-absorbing particles in a defined area in the rear volume. Multiple apertures. In some embodiments, the housing may include a sound port pad interposed between the acoustic sensor and the sound port disposed in the second housing element, wherein the sound port pad is configured to The first housing element seals the sound port from the rear volume when engaged with the second housing element. Another embodiment of a housing for a mobile device may include: a first housing element that includes an acoustic sensor (eg, a speaker or receiver); and a second housing element that is mechanically coupled to The first housing element forms the housing of the mobile device. The second housing may include: a continuous vertical member defining a substantially sealed acoustic chamber; an audio port disposed in a sensor volume acoustically coupled to the acoustic sensor; and an inner vertical member defining a substantially sealed acoustic chamber. Positioned within the acoustic chamber and intersecting the continuous vertical element to define a rear volume. In this embodiment, the inner vertical element may include: an opening configured for gas exchange; a low-resistance insert that completely covers the opening; and a plurality of sound-absorbing particles disposed within the rear volume. ;A sound-transmissive material mechanically coupled to the continuous vertical element and the inner vertical element, and enclosing the continuous vertical element and the inner vertical element to form a defined space for retaining the sound-absorbing particles; the The defined space and the acoustic sensor are arranged side by side in the acoustic chamber, and the breathable material is not facing the acoustic sensor. In this embodiment, the acoustic sensor occupies the sensor space when the first housing element and the second housing element are coupled together. This embodiment may also include a chamber liner disposed at the top portion of the continuous vertical element, wherein a thickness of the chamber liner determines the size of the restriction by which gas exchange is facilitated. In some embodiments, the housing may include a sound port pad interposed between the acoustic sensor and the sound port disposed in the second housing element, wherein the sound port pad is configured to The first housing element seals the sound port from the rear volume when engaged with the second housing element. In some embodiments, the low sound resistance insert and the acoustically transparent material in the interior vertical element each include one or more of a cashmere material or a mesh material. Furthermore, in some embodiments, the rear volume portion of the acoustic chamber is partially filled with zeolite-based sound-absorbing particles having substantially spherical particles having a minimum diameter of at least 300 microns and a maximum diameter of 900 microns. An embodiment of a mobile device casing can be manufactured in the following manner. After the shroud has been substantially completed, it is easy to receive the sound-absorbing material in a portion of the acoustic chamber back volume designated for the material. A quantity of sound-absorbing material is measured and loaded into a dispensing funnel. The shield is positioned under the dispensing funnel and vibrates when the sound-absorbing material is poured into a designated portion or portions of the rear volume of the acoustic chamber. If the rear volume has multiple chambers, the sound-absorbing material measuring and dispensing steps will be repeated as many times as necessary. After filling, the shield vibrates multiple times to ensure that the sound-absorbing material settles into the designated portion or portions of the acoustic chamber. Next, a breathable member is placed over the acoustic chamber and mechanically attached to the acoustic chamber by gluing, ultrasonic welding, or other techniques. Aligning a chamber liner with the wall of the acoustic chamber, and then bonding the printed circuit substrate to the shroud, thereby completing the housing of the acoustic sensor of the mobile device. Other embodiments of a mobile device casing can be manufactured in the following manner. After the shroud has been substantially completed, it is easy to receive the sound-absorbing material in a portion of the acoustic chamber back volume designated for the material. A breathable member is placed over the acoustic chamber that will receive the sound-absorbing material and is mechanically attached to the acoustic chamber by gluing, ultrasonic welding, or other techniques. A quantity of sound-absorbing material is measured and loaded into a dispensing funnel. The shroud is positioned below the dispensing funnel, and the sound-absorbing material is poured into a designated portion of the rear volume of the acoustic chamber through a dispensing funnel aligned with a filling port disposed in the shroud. or several specified parts vibrate. If the rear volume has multiple chambers, the sound-absorbing material measuring and dispensing steps will be repeated as many times as necessary. After filling, the shield vibrates multiple times to ensure that the sound-absorbing material settles into the designated portion or portions of the acoustic chamber. Aligning a chamber liner with the wall of the acoustic chamber, and then bonding the printed circuit substrate to the shroud, thereby completing the housing of the acoustic sensor of the mobile device. Other features and advantages of the disclosed invention will be apparent from the following description in conjunction with the following drawings.

A detailed description of the disclosed embodiments will be provided with reference to the accompanying drawings. While the invention is susceptible to embodiments in many different forms, the drawings illustrate (and will be described in detail) preferred embodiments of the invention, with the understanding that this disclosure is considered an exemplification of the principles of the invention, and There is no intention to limit the broad aspects of the invention to the illustrated embodiments. Referring to FIGS. 1 and 2 , a speaker device 10 is shown. The speaker device 10 includes an upper speaker housing 13 , a lower speaker housing 14 , and an acoustic sensor 12 . Upper speaker housing 13 is joined to lower speaker housing 14 using fasteners, locking tabs, or a suitable adhesive. The adhesive used to join the upper speaker housing 13 and the lower speaker housing 14 should not have any exhaust characteristics that could affect the sound-absorbing material in the rear volume and affect its efficiency. When the sound absorbing material 19 is disposed internally in the speaker device 10, the dotted line 15 indicates the internal position of the sound absorbing material 19 in the speaker device. The upper speaker housing 13 includes a sensor opening 11 that allows sound propagation/airflow from the acoustic sensor 12 to the space outside the device. Other components of the speaker device, such as electrical contacts, pads, and internal wiring, are not shown in Figure 1 . Referring to FIG. 2 , a method of encapsulating the sound-absorbing material 19 is shown. "Sound-absorbing material" (as used herein) refers to the zeolite material disclosed in Application No. 13/818,374, but other sound-absorbing materials may be used if necessary. As shown along section line AA in Figure 2, the rear volume 17 of the loudspeaker device 10 extends around the acoustic sensor 12 and into the inner portion of the rear volume in which the sound-absorbing bag 16 is disposed. Application No. 14/003,217, the entire contents of which is incorporated herein by reference, discloses a technique for using a bag of enclosed sound-absorbing material 19 . As disclosed in Application No. 14/003,217, the sound-absorbing bag 16 is fabricated to fit the interior contour of the rear volume, and one side of the sound-absorbing bag 16 includes a space between the facilitating rear volume and the interior volume of the sound-absorbing bag 16 One of the gas exchange, one of the low sound resistance, one of the breathable materials. The breathable material must also retain the sound-absorbing material 19 within the interior cavity of the bag. The remaining sides of the sound-absorbing bag 16 are made of a material that is relatively breathable or has a high sound resistance. The sound-absorbing bag 16 is positioned so that gas exchange occurs between the sound-absorbing material 19 and the rear volume 17 through the breathable material. Referring to Figure 3, another method of retaining the sound absorbing material 19 within the rear volume of the speaker device 10 is shown. As shown in Figure 3 along section line AA, instead of a sound-absorbing bag 16, a breathable wall 18 is placed in the rear volume 17. The breathable wall 18 is held in its position within the rear volume 17 by tabs, flanges or suitable adhesive. If an adhesive is used, it should not have any venting properties that could affect the sound-absorbing material in the rear volume and affect its absorptive capacity. Breathable wall 18 may include a perforated or etched polypropylene material, a mesh material with a low sound impedance, a filter material, or other breathable material with a low sound impedance. As shown in FIG. 3 , the sound-absorbing material 19 is held in a portion of the rear volume 17 opposite the location of the acoustic sensor 12 . As shown in FIGS. 2 and 3 , gas exchange between the sound absorbing material 19 and the rear volume 17 is promoted by placing a breathable material between the sound absorbing material 19 and the rear volume 17 . However, as shown in Figures 2 and 3, the sound absorbing material 19 located at the interface with the rear volume (ie, immediately adjacent to the breathable material) will absorb or desorb gas before the sound absorbing material 19 moves away from the rear volume interface. Even though the sound absorbing material 19 is a particle (rather than much smaller particles), the sound absorbing material 19 presents acoustic resistance to gases passing through the breathable material. This acoustic resistance causes the sound absorbing material 19 closest to the rear volume interface to have more gas exchange interaction, while the sound absorbing material further from the breathable material may have less interaction. This uneven interaction in gas exchange can cause the sound absorbing material 19 to be less efficient (if the path through the sound absorbing material is too long/narrow). Referring to Figure 4, there is depicted one embodiment of an acoustic sensor 34 disposed in a substantially sealed acoustic chamber defined by a shroud 33 and a printed circuit board 32 of an audio device. In the context of this application, an audio device includes any type of electronic device that has an audio function (such as the playback of voice messages, music or other sound files), such as a music player, a mobile phone, etc. Since sound-absorbing materials can enhance the frequency response of the microphone element, audio devices with a microphone are also included. In Figure 4, the substantially sealed acoustic chamber consists of a printed circuit board 32, a shield 33 having a continuous vertical element (ie, chamber wall 41) and a top portion of the chamber wall 41 interposed with the printed circuit board. The top portion 32 is defined between the chamber liner 37 . In some embodiments, chamber wall 41 is a continuous wall and is formed from injection molded plastic or machined from metal. Instead of a complete speaker unit having its own upper and lower speaker housings, the embodiment shown in Figure 4 relies on a printed circuit board 32 and a shroud 33 that provide the speaker housing. Typically, for this type of speaker configuration, the speaker is not completed until the printed circuit board 32 and shroud 33 of the audio device are joined. Sound port 39 allows sound to propagate to the environment outside the chamber formed by printed circuit board 32 and shield 33 and chamber liner 37 . Acoustic sensor 34 is electrically and mechanically coupled to printed circuit board 32 via sensor contacts 36 disposed therebetween. Solder or other conductive material may be used to electrically and mechanically couple acoustic sensor 34 to printed circuit board 32 . Alternatively, the acoustic sensor 34 may have spring contacts urged against the printed circuit board 32 to provide electrical continuity. Acoustic sensor 34 receives electrical signals from printed circuit board 32 via sensor contacts 36 . The acoustic sensor 34 is spaced from the sound port 39 and the inner surface of the shield 33 by a sound port liner 38 . The sound port liner 38 divides the substantially sealed acoustic chamber into a front volume 40 and a rear volume 35 . The front volume 40 is the volume accessible through the audio port 39 and bounded by the audio port pad 38 , the portion of the inner surface of the shroud 33 within the audio port pad 38 , and the portion of the acoustic sensor 34 facing the audio port 39 . The substantially sealed acoustic chamber back volume 35 is formed by a portion of the inner surface of the shroud 33 outside the sound port liner 38, the inner surface of the chamber wall 41, the chamber liner 37, and the printing within the chamber liner 37. Portions of the inner surface of the circuit board 32 define it. The rest of the printed circuit board 32 is mechanically coupled to the shroud 33 to compress the chamber liner 37 against the top portion of the chamber wall 41 , and against the acoustic sensor 34 in the area of the sound port 39 and within the shroud 33 Surface compression sound port pad 38. Compression of the chamber liner 37 and sound port liner 38 substantially seals the acoustic chamber of the acoustic sensor 34 . As is well known, the rear volume 35 improves the operation of the acoustic sensor, in this case a loudspeaker. The air flow from the rear side of the acoustic sensor 34 into the rear volume 35 during movement of the acoustic sensor 34 due to electrical signals received through the sensor contacts 36 is shown in FIG. 4 . FIG. 4 also depicts a cover 30 and a PCB housing 31 , where the cover 30 is mounted on the shield 33 and the PCB housing 31 is mounted on the printed circuit board 32 . The cover 30 and the PCB case 31 are optional components of the audio device and generally include aesthetic reasons for covering the shield 33 and the printed circuit board 32 . More specifically, the shroud 33 may have parting lines, fastener ports, or aesthetically unpleasing tooling lines, and the shroud 30 is attached to the shroud 33 to mask such manufacturing artifacts. Similarly, PCB housing 31 is mounted over printed circuit board 32 to cover patch wires, electrical traces, and other manufacturing artifacts. Referring to Figure 5, there is depicted an embodiment of an acoustic sensor 34 disposed in a substantially sealed acoustic chamber having a sound absorbing material 19 formed from a printed circuit board of an audio device. 32 and guard 33 are defined. Most structural features of the embodiment of FIG. 5 are the same as those shown in FIG. 4 . In the embodiment shown in Figure 5, the rear volume 35 now consists of a mass of sound-absorbing material 19, an internal vertical element (ie an internal chamber wall 44) and, in turn, an internal chamber wall 44, a chamber wall 41 and a breathable component. The volume defined by 43 is occupied by the breathable member 43 containing the sound absorbing material 19 . The breathable member 43 is mechanically coupled or attached to a breathable member attachment point 42 on the top portion of the chamber wall 41 and the interior chamber wall 44 . The breathable member 43 covers only those portions of the substantially sealed acoustic chamber (ie, rear volume 35) that will receive the sound absorbing material 19. Other portions of the substantially sealed acoustic chamber, such as the portion in which the acoustic sensor is located, will not be covered with the breathable member 43 . This allows the acoustic sensor 34 to be repaired and replaced without removing the breathable member 43 or disturbing the sound absorbing material 19 . The chamber liner 37 covers the portion of the breathable member 43 that is mechanically coupled or attached to the top portion of the chamber wall 41 . Although FIG. 5 only discloses a single rear volume 35 that will contain the sound-absorbing material 19, it is contemplated that the rear volume 35 may include the entire substantially sealed acoustic cavity defined by the chamber wall 41, the shroud 33, and the printed circuit board 32. Multiple chamber type areas indoors. It is further contemplated that each of the plurality of chamber type areas within the substantially sealed acoustic chamber will be formed by a breathable member 43, preferably a single piece breathable member configured to cover all chamber type areas. Breathable member 43 covers. One also anticipates that depending on the overall design of the substantially sealed acoustic chamber defined by chamber walls 41, shroud 33, and printed circuit board 32, multiple breathable members 43 may also be obtained. Additionally, covering one of the plurality of chambers containing sound-absorbing material 19 with the breathable member 43 will not cover the volume in the acoustic chamber designated to be occupied by the acoustic sensor to facilitate repair or replacement of the acoustic sensor 34 . As shown in Figure 2, a sound-absorbing bag 16 containing a sound-absorbing material 19 can be used in this type of speaker configuration, where the speaker housing is molded as or is an integral part of the housing of an audio device. One limitation of the sound-absorbing bag 16 is that the corners of the rear volume 35 (as shown in Figures 4 and 5) will not have any acoustic material disposed therein. This is due to manufacturing limitations inherent in the sound-absorbing bag 16. More specifically, the ninety degree angle cannot be molded into the acoustic bag 16 and also requires some tolerance for proper bag placement in the back volume 35, and therefore the small amount of the back volume 35 does not receive the sound absorbing material 19. Since the fill port of the sound-absorbing material 19 would be visible on the housing of an audio device and would not be aesthetically pleasing to a potential purchaser of the device, the other methods shown in Figure 3 would not be suitable for this type of speaker configuration in which the speaker housing Molded as or an integral part of the housing of the audio device. Additionally, there is a danger that regular daily use of audio equipment will cause the seal above the fill port to shift out of place or break, thereby allowing the sound-absorbing material to leak out. The air flow from the rear side of the acoustic sensor 34 to the rear volume 35 during movement of the acoustic sensor 34 due to receipt of electrical signals through the sensor contacts 36 is shown in FIG. 5 . During operation, the acoustic sensor 34 generates pressure in the rear volume 35 and this pressure causes gas exchange with the sound-absorbing material 19 . The breathable member 43 facilitates this gas exchange between the rear volume 35 and the sound-absorbing material 19 . Preferably, the sound-absorbing material 19 is a loose zeolite particulate material as disclosed in US Application No. 14/818,374 (the entire content of which is incorporated by reference). More preferably, the loose zeolite particulate material (used as the sound absorbing material 19) is substantially spherical and has a diameter in the range of 100 microns or greater. The loose zeolite particulate material is preferred because of its ease of use in making an acoustic device of the type disclosed herein. Other types of sound-absorbing materials (such as zeolite powder or activated carbon) can also be used, but may be less easy to use in the manufacturing process. As is known in the art, the energy of sound or gas passing through a material can be described together with the acoustic resistance (ie, measured in units of MKS rayl). For the embodiment shown in Figure 5, the breathable member 43 should have an acoustic resistance (usually 260 MKS Rui). If the opening is small, the material selected for the breathable member 43 may cause the acoustic resistance at the opening to exceed the 260 MKS Ray threshold, thereby resulting in poor acoustic performance. More specifically, if the 260 MKS threshold is exceeded, the gas in the rear volume is prevented from reaching the sound absorbing material 19 . Therefore, if a cashmere material is selected for use as the breathable member 43, care must be taken not to exceed the 260 MKS threshold, especially if the limit 51 is smaller. For some embodiments, the cashmere material is a heterogeneous material, and more specifically, a flat layer material made of nylon fibers having an undefined pattern. The purpose of the cashmere material is to retain the sound absorbing material 19 and to allow gas to interact with the sound absorbing material 19 . The structure of the cashmere material and any pores in the material make it impossible for the sound-absorbing material 19 (in powder form, particulate form or granular form) to pass through the cashmere material. Alternatively, a mesh material may be used for breathable member 43. In some embodiments, unlike the cashmere material, the surface structure and material structure of the mesh material are well defined. For example, a layer of mesh material suitable for use as the breathable member 43 may have a nominal thickness of 115 microns, a pore size of 130 microns, and an acoustic resistance of 8.5 MKS Rays per square centimeter. Like the cashmere material, the purpose of the mesh material is to retain the sound-absorbing material 19 and allow gas to interact with the sound-absorbing material 19 . The structure of the mesh material and any pores in the material are such that the sound absorbing material 19 (in powder form, particulate form or granular form) cannot pass through the mesh material. Acoustic engineers have wider design latitude relative to mesh materials because the acoustic resistance of mesh materials is low and a known quantity. Breathable member 43 may be coupled to the top portion of chamber wall 41 and the top portion of interior chamber wall 44 by gluing, crimping, stamping, embossing, heat sealing, or preferably by ultrasonic welding. Breathable member attachment point 42. One advantage of ultrasonic welding is that a consistent and reliable adhesive is formed between the breathable member 43, which is a cashmere or mesh, and the top portion of the chamber wall 41 and the top portion of the inner chamber wall 44. shape material. Ultrasonic welding causes materials to fuse, thereby forming a strong mechanical joint when the materials are fused together. Typically, ultrasonic welding softens the fibers in the mesh material but does not melt them. Ultrasonic welding technology ensures that the material including the breathable member 43 is securely fastened to the top portion of the chamber wall 41 and the top portion of the inner chamber wall 44, thereby preventing any leakage of the sound-absorbing material 19 while still allowing gas and sound-absorbing material 19 interactions. Another feature of using the breathable member 43 to retain the sound absorbing material 19 is that the acoustic sensor 34 can be repaired or replaced without disturbing or losing the sound absorbing material 19 . Secure attachment of the breathable member 43 to the top portion of the chamber wall 41 and the top portion of the interior chamber wall 44 prevents the sound absorbing material 19 from leaking out of its designated volume. As shown in FIG. 5 , restriction 51 is the passageway between the top portion of interior chamber wall 44 and the interior surface of printed circuit board 32 . The size of the limit 51 is based on the thickness of the chamber liner 37 . Preferably, the thickness of chamber liner 37 is 0.3 mm, but other thicknesses may be used to adjust the height of limit 51. In the embodiment shown in Figure 5, the interior chamber wall 44 is formed from a solid material (preferably injection molded plastic or machined metal). In the speaker embodiments shown in FIGS. 2 and 3 , the limited amount of surface area exposure of the sound absorbing material 19 may affect the effectiveness of the sound absorbing material 19 . More specifically, because the airflow is higher close to the acoustic sensor and the airflow is lower at the wall at the far end of the trailing volume, the sound absorption is further away from the breathable material that facilitates gas exchange between the sound absorbing material 19 and the trailing volume. The material 19 does not experience the same amount of air flow/gas velocity as the sound absorbing material 19 close to the breathable member. This is due to the acoustic spring formed by the proximity of the rear volume and the sound absorbing material 19 which itself presents a certain amount of acoustic resistance to the gas pushed into the volume occupied by the sound absorbing material 19 . Furthermore, gas exchange must flow through the restriction 51 between the top surface of the interior chamber wall 44 and the printed circuit board 32 . Limit 51 may also present additional acoustic resistance if the acoustic resistance becomes too small. The embodiment shown in FIG. 5 only has a PCB housing 31 instead of a cover 30 . In this embodiment, the outer surface of the shroud 33 has been polished to present an aesthetically pleasing surface to the purchaser of the device, and therefore the shroud 30 is exotic. PCB housing 31 is present due to the electrical traces of printed circuit board 32 . Referring to Figure 6, there is depicted another embodiment of an acoustic sensor 34 disposed in a substantially sealed acoustic chamber having a sound absorbing material 19 formed by an audio device. Printed circuit board 32 and shield 33 define. Most structural features of the embodiment of FIG. 6 are the same as those shown in FIG. 5 . In the embodiment shown in Figure 6, the rear volume 35 is now composed of a mass of sound absorbing material 19, an internal chamber wall 44 and within the volume bounded by the internal chamber wall 44, the chamber wall 41 and the breathable member 43 A breathable member 43 containing sound absorbing material 19 is occupied. The breathable member 43 is mechanically coupled or attached to a breathable member attachment point 42 on the top portion of the chamber wall 41 and the interior chamber wall 44 . The breathable member 43 covers only those portions of the substantially sealed acoustic chamber (ie, rear volume 35) that will receive the sound absorbing material 19. Other portions of the substantially sealed acoustic chamber, such as the portion in which acoustic sensor 34 is located, will not be covered with breathable member 43 . This allows the acoustic sensor 34 to be repaired and replaced without removing the breathable member 43 or disturbing the sound absorbing material 19 . The chamber liner 37 covers the portion of the breathable member 43 that is mechanically coupled or attached to the top portion of the chamber wall 41 . In the shroud 33, a filling port 52 is shown. The filling port 52 is located in the underside of the shroud 33 and provides a port between the portion of the volume 35 that is filled with the sound-absorbing material 19 and the exterior of the shroud 33 . The loading port 52 is used to facilitate a special technique for loading a specific type of sound absorbing material 19 into the rear volume. Filling port 52 is covered with a filling port seal 53 . The filling port seal 53 may be made of a foil or film material and may be self-adhesive. Any adhesive used in the vicinity of the sound absorbing material 19 should not adversely affect the performance of the sound absorbing material. The portion of the fillport 52 on the exterior of the shroud 33 preferably has a countersunk cavity or ring around its diameter that accommodates the fillport seal 53, and so the fillport seal 53 is flush with the outer surface of the shroud 33. The size of the filling port should be at least 1.5 mm in diameter. Figure 6 shows two filling ports 52, one in the underside of the shroud 33 and one in the chamber wall 41, in actual practice only one filling port 52 will be used. The location of the filling port 52 will depend on several factors, such as the design of the shroud 33 , the physical complexity of the volume area designated to contain the sound-absorbing material 19 , and the use of other components to fill the shroud 33 and insert the sound-absorbing material 19 the manufacturing sequence. Unlike the embodiment shown in FIG. 5 , the embodiment in FIG. 6 includes a cover 30 because the cover 33 may have parting lines, fastener ports, or aesthetically unpalatable tooling lines, and The shroud 33 may have a filling port 52 with a filling port seal 53 that needs to be covered. Although FIGS. 5 and 6 only disclose a single rear volume 35 that will contain the sound absorbing material 19 , it is contemplated that the rear volume 35 may include the entire substantially sealed space bounded by the chamber wall 41 , the shroud 33 and the printed circuit board 32 Multiple chamber type areas within an acoustic chamber. It is further contemplated that each of the plurality of chamber type areas within the substantially sealed acoustic chamber will be comprised of a breathable member 43, preferably a single piece breathable member configured to cover all chamber type areas. Breathable member 43 covers. One also anticipates that depending on the overall design of the substantially sealed acoustic chamber defined by chamber walls 41, shroud 33, and printed circuit board 32, multiple breathable members 43 may also be obtained. Additionally, covering one of the plurality of chambers containing sound-absorbing material 19 with the breathable member 43 will not cover the volume in the acoustic chamber designated to be occupied by the acoustic sensor to facilitate repair or replacement of the acoustic sensor 34 . The embodiment shown in FIG. 6 has a PCB housing 31 and a cover 30 . In this embodiment, even though the outer surface of the shield 33 may be polished to present an aesthetically pleasing surface to the device purchaser, if the filling port 52 is positioned so that it penetrates the outer surface of the shield 33, then There is a danger that the filling port seal 53 can be damaged or displaced, and the sound-absorbing material 19 can become contaminated or can leak out of the rear volume. Thus, the cover 30 protects the filling port seal 53 and provides an aesthetically pleasing surface to the device purchaser. PCB housing 31 is present due to the electrical traces of printed circuit board 32 . 7 and 8 are views of the acoustic device 30 along section line BB. Referring to Figure 7, a wall opening 50 is provided in the interior chamber wall 44. In the wall opening 50, an upper tab 46, side tabs 45 and a lower tab 47 are provided. The tabs may be a long piece of solid material (as shown in Figure 7) or may be a series of tabs occupying substantially the same space as the long piece of solid material shown in Figure 7. Tabs 45, 46, 47 may be injection molded plastic, machined metal, or other suitable materials. A breathable insert 48 is disposed in the wall opening 50 and is held in position by upper tabs 46 , side tabs 45 and lower tabs 47 . The breathable insert 48 retains the sound absorbing material 19 in the cavity bounded by the chamber wall 41 , the inner chamber wall 44 and the breathable member 43 . The breathable insert 48 also expands the amount of exposed surface area of the sound absorbing material 19 . Therefore, gas exchange occurs through the breathable member 43 and the breathable insert 48, thereby improving the efficiency of the sound absorbing material 19. The breathable insert 48 may be fabricated from the same materials discussed above for the breathable member 43 and should have an acoustic resistance in MKS Rays below the established threshold for the breathable member 43 . Referring to Figure 8, another embodiment of a breathable insert 48 is shown. In this embodiment, an air-impermeable material is etched, stamped, or otherwise machined to have a plurality of vents 49 . The vents 49 are sized to prevent the sound absorbing material 19 from passing through the vents while allowing gas exchange between the rear volume 35 and the sound absorbing material 19 to occur. Preferably, polypropylene foil is used to create the breathable insert 48. There are several reasons why polypropylene foil is an ideal material for the breathable insert 48. Polypropylene foil does not become brittle as it ages, it is highly resistant to damaging ultraviolet light, and it is resistant to damage from several types of chemicals. Generally speaking, polypropylene foil has a very low density of less than 1 gram/ ^cm3 and most foils are heat resistant up to 140 degrees Celsius. Similar materials such as ^Kapton® may also be used. The vents 49 can be formed in a variety of geometric shapes and sizes, as long as the vents 49 do not exceed a predetermined acoustic resistance threshold (preferably 260 MKS Ray). Referring to Figure 9, the embodiment illustrated herein is based on the internal chamber wall 44 embodiment shown in Figures 7 and 8. The chamber liner 37 has been expanded to include a portion disposed between the top portion of the interior chamber wall 44 and the printed circuit board 32 . Since the wall opening 50 and the breathable insert 48 allow the exchange of gases between the rear volume 35 and the sound-absorbing material 19, the additional portion of the chamber liner 37 closes the acoustic path along the printed circuit board 32 and routes the gases to the wall Opening 50. Although it may appear that the breathable member 43 is now redundant, it is still necessary to maintain the sound-absorbing material 19 within its defined volume if the acoustic sensor 34 needs to be repaired or replaced. Referring to Figures 10A-10B, a method for manufacturing an audio device having a speaker housing as an integral part of its housing is disclosed. Preferably, the manufacturing method is carried out using computer controlled manufacturing equipment for maximum efficiency, although manual assembly of the audio device is also contemplated. More specifically, the manufacturing process is described assuming that the audio device undergoing assembly has been placed in an assembly carrier that moves the audio device along an assembly trajectory through various computer-controlled assembly stations. There may be other steps not described in this manufacturing method, such as inserting pads or making electrical connections. However, these types of steps are common to manufacturing processes and are not part of the invention. Referring to FIGS. 10A and 10B , one embodiment of a method of manufacturing an audio device having a speaker housing as an integral part of its housing will be described. In step S100, the shield 33 is placed in an assembly carrier, and the dispensing funnel is aligned with the rear volume 35 of the shield 33. At this stage of the manufacturing process, the assembled audio device is positioned in an assembly carrier, and preferably the assembly carrier facilitates the alignment of the dosing funnel with the rear volume 35 in the shroud 33 . Alternatively, the dosing funnel can be manually aligned with the rear volume 35 in the guard 33 . The purpose of the dosing funnel is to ensure that the entire measured dose of sound-absorbing material enters the volume 35 after the shield 33 . Preferably, a zeolite material having a substantially spherical shape is used as the sound-absorbing material, and this zeolite material is preferably in the form of filling a volume behind a closed shield 33. At this stage of the acoustic device manufacturing process, it is assumed that no other components need to be installed in the shroud 33 , with the exception of the acoustic sensor 34 . Although additional components can be added after the sound-absorbing material 19 has been placed in the rear volume 35 , there is a risk of disturbing or contaminating the sound-absorbing material 19 . In step S110, a predetermined amount of sound-absorbing material is loaded into the dispensing funnel. The amount of sound-absorbing material to be loaded into the rear volume 35 of the shroud 33 is determined based on the desired acoustic effect that the designer wishes to achieve. For example, the amount of sound-absorbing material deposited into the rear volume 35 of the shroud 33 depends on the amount of resonant displacement that the acoustic design engineer wishes to achieve. The measurement of the amount of sound-absorbing material 19 inserted into the rear volume 35 in the shroud 33 is performed volumetrically or gravimetrically. In step S120 , the carrier of the acoustic device subjected to dosing is vibrated while the sound-absorbing material 19 from the dosing tank is poured into the dosing funnel and subsequently into the rear volume 35 of the shield 33 . If the sound-absorbing material 19 is in powder, particulate or granular form, the shroud 33 is vibrated as the sound-absorbing material 19 is poured into the rear volume 35 via the dispensing funnel to allow relatively rapid and even dispersion of the material. In step S130, the vibration of the carrier holding the shield 33 is stopped for a predetermined time. The cessation of vibration allows the sound-absorbing material 19 now located inside the rear volume 35 in the shroud 33 to settle. The settlement of the sound-absorbing material 19 is important in measuring whether the back volume has been properly filled. In step S140, the vibration of the carrier holding the shield 33 is resumed for a predetermined time. Repeated vibrations of the shield 33 both during and after the dispensing step are necessary to ensure that the sound-absorbing material 19 inside the rear volume 35 of the shield 33 has reached all cavities in the rear volume 35 . As previously shown, the settlement of the sound-absorbing material 19 is important in measuring whether the rear volume 35 has been properly filled. When the second vibration of the shield 33 ends, the dispensing funnel is removed. In step S150 , the level of the sound-absorbing material 19 inside the rear volume 35 of the shield 33 is measured. Measurements can be completed visually. Preferably, the level measurement is performed using a laser illuminating the sound-absorbing material 19 . In step S160 , the measured position of the sound-absorbing material 19 in the rear volume 35 is compared with the design requirements of the manufactured special shield 33 . If the level of the sound-absorbing material 19 is lower than the design specification, in step S170, the shield 33 is rejected. If the level of the sound absorbing material 19 is within the design specifications, the manufacturing process moves to step S180. In step S180 , the breathable member 43 is aligned with and attached to the top portion of the chamber wall 41 and the inner chamber wall 44 The top part of 44. The breathable member 43 retains the sound absorbing material 19 in a designated volume within the rear volume 35 . As indicated herein, the breathable member 43 may be coupled to the top portion of the chamber wall 41 and the interior chamber wall 44 by gluing, crimping, stamping, embossing, heat sealing, or preferably by ultrasonic welding. Breathable member attachment points 42 on the top portion. If an adhesive is used, it preferably does not have any venting properties that could affect the effectiveness of the sound-absorbing material 19 in the rear volume 35 . In step S190, the chamber liner 37 is aligned with the chamber wall 41 in the shroud 33. Align chamber liner 37 with chamber wall 41 in shroud 33 . As shown in Figures 5, 6 and 9, the chamber liner is supported on the top portion of the chamber wall 41 and is positioned over the chamber wall 41 now attached to the breathable member attachment point 42. above the breathable component 43. At this point in the assembly process, the acoustic sensor 34 can be placed in position within the shroud 33 . Alternatively, the acoustic sensor 34 may be mechanically attached to the printed circuit board 32 and then manipulated into position when the printed circuit board 32 is bonded to the shroud 33 . In step S200, the printed circuit board 32 and the shroud 33 are aligned and the two components are mated together to create the finished acoustic device. Mechanical attachment of the printed circuit board 32 and shield 33 is accomplished using fasteners, suitable adhesives, and/or interlocking tabs molded into the respective components. If an adhesive is used, it preferably does not have any venting properties that could affect the sound-absorbing material 19 in the rear volume 35 . The attachment of the printed circuit board 32 and shield 33 creates a sealed acoustic chamber within the housing housing of the acoustic sensor 34 . In step S210, the complete acoustic device is removed from the self-assembly carrier, and the complete acoustic device is tested to determine whether it meets the design requirements of the acoustic device. Referring to FIGS. 11A-11B , another method for manufacturing an audio device having a speaker housing as an integral part of its housing is disclosed. Preferably, the manufacturing method is carried out using computer controlled manufacturing equipment for maximum efficiency, although manual assembly of the audio device is also contemplated. More specifically, the manufacturing process is described assuming that the audio device undergoing assembly has been placed in an assembly carrier that moves the audio device along an assembly trajectory through various computer-controlled assembly stations. There may be other steps not described in this manufacturing method, such as inserting pads or making electrical connections. However, these types of steps are common to manufacturing processes and are not part of the invention. Referring to FIGS. 11A and 11B , another embodiment of a method of manufacturing an audio device having a speaker housing as an integral part of its housing will be described. In step S300, the shield 33 is placed in an assembly carrier. During this stage of the manufacturing process, the assembled audio device is positioned in an assembly carrier, and in some embodiments of the manufacturing process, the assembled audio device at different angles will have to be aligned during the manufacturing process. In step S310 , the breathable member 43 is aligned with and attached to the top portion of the chamber wall 41 and the inner chamber wall 44 The top part of 44. The breathable member 43 retains the sound absorbing material 19 in a designated volume within the rear volume 35 . As indicated herein, the breathable member 43 may be coupled to the top portion of the chamber wall 41 and the interior chamber wall 44 by gluing, crimping, stamping, embossing, heat sealing, or preferably by ultrasonic welding. Breathable member attachment points 42 on the top portion. If an adhesive is used, it preferably does not have any venting properties that could affect the effectiveness of the sound-absorbing material 19 in the rear volume 35 . In step S320, the shield in the assembly carrier is realigned to expose the filling port 52 so that the dispensing funnel can be aligned with the filling port 52. Preferably, the assembly carrier facilitates alignment of the dispensing funnel with the filling port 52, which will allow the sound-absorbing material 19 to enter the shroud 33 and into the post-displacement volume 35. Alternatively, the dispensing funnel may be manually aligned with the filling port 52 in the shroud 33 . The purpose of the dosing funnel is to ensure that the entire measured dose of sound-absorbing material 19 enters the rear volume 35 of the shield 33 . Preferably, a zeolite material having a substantially spherical shape is used as the sound absorbing material 19, and this zeolite material is preferably in the form of filling a volume behind a closed shield 33. At this stage of the acoustic device manufacturing process, it is assumed that no other components need to be installed in the shroud 33 , with the exception of the acoustic sensor 34 . Although additional components can be added after the sound-absorbing material 19 has been placed in the rear volume 35 , there is a risk of disturbing or contaminating the sound-absorbing material 19 . In step S330, a predetermined amount of sound-absorbing material is loaded into the dispensing funnel. The amount of sound-absorbing material to be loaded into the rear volume 35 of the shroud 33 is determined based on the desired acoustic effect that the designer wishes to achieve. For example, the amount of sound-absorbing material deposited into the rear volume 35 of the shroud 33 depends on the amount of resonant displacement that the acoustic design engineer wishes to achieve. The measurement of the amount of sound-absorbing material 19 inserted into the rear volume 35 in the shroud 33 is performed volumetrically or gravimetrically. In step S340 , the carrier of the acoustic device subjected to dosing is vibrated while the sound-absorbing material 19 from the dosing tank is poured into the dosing funnel and subsequently into the rear volume 35 of the shield 33 through the filling port 52 . If the sound-absorbing material 19 is in powder, particulate or granular form, the vibrating shield 33 and filling port 52 allow the material to be dispersed relatively quickly and evenly as the sound-absorbing material 19 is poured into the rear volume 35 via the dosing funnel. In step S350, the vibration of the carrier holding the shield 33 is stopped for a predetermined time. The cessation of vibration allows the sound-absorbing material 19 now located inside the rear volume 35 in the shroud 33 to settle. The settlement of the sound-absorbing material 19 is important in measuring whether the back volume has been properly filled. In step S360, the vibration of the carrier holding the shield 33 is resumed for a predetermined time. Repeated vibrations of the shield 33 both during and after the dispensing step are necessary to ensure that the sound-absorbing material 19 inside the rear volume 35 of the shield 33 has reached all cavities in the rear volume 35 . As previously shown, the settlement of the sound-absorbing material 19 is important in measuring whether the rear volume 35 has been properly filled. When the second vibration of the shield 33 ends, the dispensing funnel is removed. In step S370 , the level of the sound-absorbing material 19 inside the rear volume 35 of the shield 33 is measured. Measurements can be completed visually. Preferably, the level measurement is performed using a laser illuminating the sound-absorbing material 19 . In step S380, the measured position of the sound-absorbing material 19 in the rear volume 35 is compared with the design requirements of the manufactured special shield 33. If the level of the sound-absorbing material 19 is lower than the design specification, in step S390, the shield 33 is rejected. If the level of the sound absorbing material 19 is within the design specifications, the manufacturing process moves to step S400. In step S400, a filling port seal 53 is used to seal the filling port 52. Filling port seal 53 may be a plug-in seal assembled to filling port 52 or a foil or film glued or attached to filling port 52 . The foil or film is self-adhesive. In step S410, the chamber liner 37 is aligned with the chamber wall 41 in the shroud 33. As shown in Figures 5, 6 and 9, the chamber liner is supported on the top portion of the chamber wall 41 and is positioned over the chamber wall 41 now attached to the breathable member attachment point 42. above the breathable component 43. At this point in the assembly process, the acoustic sensor 34 can be placed in position within the shroud 33 . Alternatively, the acoustic sensor 34 may be mechanically attached to the printed circuit board 32 and then manipulated into position when the printed circuit board 32 is bonded to the shroud 33 . Next, the printed circuit board 32 and shroud 33 are aligned, and the two housings are mated together to create the finished acoustic device. Mechanical attachment of the printed circuit board 32 and shield 33 is accomplished using fasteners, suitable adhesives, and/or interlocking tabs molded into the assembly. If an adhesive is used, it preferably does not have any venting properties that could affect the sound-absorbing material 19 in the rear volume 35 . The attachment of the printed circuit board 32 and shield 33 creates a sealed acoustic chamber within the housing housing of the acoustic sensor 34 . In step S420, the complete acoustic device is removed from the self-assembly carrier, and the complete acoustic device is tested to determine whether it meets the design requirements of the acoustic device. The foregoing description of preferred embodiments of the invention has been presented for purposes of illustration and description. The foregoing description is not intended to be exhaustive or to limit the invention to the precise forms disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the invention. The embodiment was chosen and described in order to explain the principles of the invention and its practical application to enable others skilled in the art to utilize the invention in various embodiments with various modifications as are suited to the particular use contemplated. It should be noted that any entity disclosed herein (eg, speaker device, etc.) is not limited to a dedicated entity as described in some embodiments. Rather, the disclosed invention may be implemented in a variety of ways and with any granularity at the device level while still providing the desired functionality. It should be noted that the term "comprising" does not exclude other elements or steps and "a" does not exclude the plural. Furthermore, elements described in association with different embodiments may be combined. It should also be noted that component symbols in the scope of the patent application should not be regarded as limiting the scope of the patent application. Although specific embodiments have been shown and described, numerous modifications may be made without materially departing from the spirit of the invention, and the scope of protection is limited only by the scope of the appended claims. In addition, abbreviations are used only to enhance the readability of the specification and patent claims. It should be noted that these abbreviations are not intended to reduce the generality of the terms used and the abbreviations should not be construed as limiting the scope of the patent application to the embodiments described therein.

10: Speaker device 12:Acoustic sensor 13: Put on the speaker housing 14:Lower speaker shell 15: dashed line 16:Sound-absorbing bag 17: Rear volume 18: Breathable wall 19: Sound-absorbing materials 30:Cover/acoustic device 31: Printed circuit board (PCB) housing 32:Printed circuit board 33:Shield 34:Acoustic sensor 35: Rear volume 36: Sensor contact 37: Chamber liner 38: Sound port pad 39: Yinbu 40: Front volume 41: Chamber wall 42: Breathable member attachment points 43: Breathable components 44: Internal chamber wall 45: Side protrusions 46: Upper tab 47: Lower tab 48: Breathable inserts 49: Vents 50: Wall opening 51:Restrictions 52:Loading port 53: Filling port seal A-A: section line B-B: section line S100: Steps S110: Steps S120: Steps S130: Steps S140: Steps S150: Steps S160: Steps S170: Steps S180: Steps S190: Steps S200: Steps S210: Steps S300: Steps S310: Steps S320: Steps S330: Steps S340: Steps S350: Steps S360: Steps S370: Steps S380: Steps S390: Steps S400: Steps S410: Steps S420: Steps

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the "modes", serve to explain the objects, advantages, and principles of the invention. In the diagram, Figure 1 is a three-quarter view of a loudspeaker device for installation in an acoustic device; Figure 2 is a longitudinal cross-sectional view of the loudspeaker device of Figure 1 with a first embodiment including sound absorbing material; Figure 3 is a longitudinal cross-sectional view of the speaker device of Figure 1 with a second embodiment including sound absorbing material; Figure 4 is a longitudinal cross-sectional view of an acoustic device, wherein a shroud and a printed circuit board of the acoustic device provide an acoustic chamber enclosing the acoustic sensor; Figure 5 is a longitudinal cross-sectional view of an acoustic device, wherein a shroud and a printed circuit board of the acoustic device provide an acoustic chamber enclosing an acoustic sensor and a sound-absorbing material according to a first embodiment of the present invention; Figure 6 is a longitudinal cross-sectional view of an acoustic device, wherein a shroud and a printed circuit board of the acoustic device provide an acoustic chamber enclosing an acoustic sensor and a sound-absorbing material according to a second embodiment of the present invention; Figure 7 is a cross-sectional view of a first embodiment of an internal chamber wall according to the present invention; Figure 8 is a cross-sectional view of a second embodiment of an internal chamber wall according to the present invention; Figure 9 is a longitudinal cross-sectional view of an acoustic device, wherein a shroud and a printed circuit board of the acoustic device provide an acoustic chamber enclosing an acoustic sensor and a sound-absorbing material according to a third embodiment of the present invention; 10A and 10B are process flow diagrams for fabricating an acoustic device in which a shroud and a printed circuit board provide an acoustic chamber that encloses an acoustic sensor and sound absorption in accordance with an embodiment of the present invention. materials; and 11A and 11B are process flow diagrams for fabricating an acoustic device in which a shroud and a printed circuit board provide an acoustic chamber enclosing an acoustic sensor and sound absorption in accordance with an embodiment of the present invention. Material. Those skilled in the art should understand that the components in the figures are illustrated for simplicity and conciseness only. It will be further understood that certain actions and/or steps may be described or depicted in a specific order of occurrence, and those skilled in the art will understand that such specificity with respect to order is not actually required. It should also be understood that the terms and expressions used herein have their general meanings relative to their respective corresponding scopes of investigation and research, except for specific meanings otherwise stated herein.

30:Cover/acoustic device

31: Printed circuit board (PCB) housing

32:Printed circuit board

33:Shield

34:Acoustic sensor

35: Rear volume

36: Sensor contact

37: Chamber liner

38: Sound port pad

39: Yinbu

40: Front cavity volume

41: Chamber wall

Claims (19)

A housing for a mobile device, which includes: a shield, the shield includes: a chamber wall for defining a substantially sealed acoustic chamber; an acoustic sensor disposed in the acoustic chamber ; an audio port acoustically coupled to the acoustic sensor; an interior chamber wall disposed within the acoustic chamber and defining a rear volume; a plurality of sound absorbing materials disposed within the rear volume; A breathable member mechanically coupled to and enclosed with the chamber wall and the top portion of the interior chamber wall for retaining the sound absorbing material in the rear volume within, the breathable member and the acoustic sensor are disposed side by side within the acoustic chamber; and a chamber liner disposed on the top portion of the chamber wall, wherein a thickness determination of the chamber liner is facilitated by One of the limitations of gas exchange is the size. A mobile device casing as claimed in claim 1, wherein the breathable member has low sound resistance and includes one or more of a cashmere material or a mesh material. A mobile device casing as claimed in claim 2, wherein the pore size of the material of the breathable member is adapted to be smaller than the granules size of the sound-absorbing material. For example, the mobile device casing of claim 1, wherein the breathable member is made of adhesive, roll Edges, stamping, embossing, heat sealing or ultrasonic welding are mechanically attached to the chamber wall and the interior chamber wall. The casing of the mobile device of claim 1, further comprising a sound port pad interposed between the acoustic sensor and the sound port disposed in the shield, wherein the sound port pad is inserted from the rear Set volume seal-front volume. The mobile device casing of claim 1, wherein the rear volume portion of the acoustic chamber is partially filled with substantially spherical zeolite-based sound-absorbing particles having a minimum diameter of at least 300 microns. A housing for a mobile device, comprising: a first housing component including an acoustic sensor; a second housing component mechanically coupled to the first housing component to form the mobile device The housing, wherein the second housing element includes: a continuous vertical element for defining a substantially sealed acoustic chamber; an audio port disposed in a sensor space that is acoustically coupled to the acoustic sensor ; an internal vertical element placed in the acoustic chamber and defining a rear volume with the continuous vertical element; a plurality of sound-absorbing particles placed in the rear volume; a sound-permeable material mechanically Coupled to the top portion of the continuous vertical element and the inner vertical element and enclosed with the continuous vertical element and the inner vertical element for The sound-absorbing particles are retained within the rear volume; the sound-permeable material and the acoustic sensor are disposed side by side within the acoustic chamber; and a chamber liner is disposed on the top portion of the continuous vertical element, wherein the chamber A thickness of the gasket determines the size of the restriction by which gas exchange is facilitated; wherein the acoustic sensor occupies the sensor space when the first housing element and the second housing element are coupled together. The mobile device casing of claim 7, wherein the rear volume portion of the acoustic chamber is partially filled with zeolite-based sound-absorbing particles having substantially spherical particles having a minimum diameter of at least 200 microns. The mobile device casing of claim 7, wherein the rear volume portion of the acoustic chamber is partially filled with zeolite-based sound-absorbing particles having substantially spherical particles having a minimum diameter of at least 350 microns. A mobile device casing as claimed in claim 7, wherein the sound-transparent material is mechanically attached to the continuous vertical element and the inner vertical element by adhesive or ultrasonic welding. The mobile device casing of claim 7, wherein the inner vertical member includes an opening configured to facilitate gas exchange of the sound-absorbing particles, wherein the opening includes a structure that is substantially the same as mechanically coupled to the continuous vertical member. One of the materials for the acoustic resistance of the sound-transmissive material of the component and the internal vertical component. The mobile device casing of claim 11, wherein the material disposed in the opening of the inner vertical element includes one or more of a cashmere material or a mesh material. The mobile device casing of claim 7, wherein the inner vertical member includes an opening configured to facilitate gas exchange of the sound-absorbing particles, wherein the opening includes a structure other than mechanically coupled to the continuous vertical member and The sound-transmissive material of the inner vertical element is an acoustically resistive material. The mobile device casing of claim 13, wherein the material disposed in the opening of the interior vertical element includes a breathable material sized to retain the sound-absorbing particles in the rear volume. Multiple apertures in a defined area. The mobile device casing of claim 7, further comprising a sound port pad interposed between the acoustic sensor and the sound port disposed in the second housing element, wherein the sound port pad is Configured to seal the sound port from the rear volume upon joining the first housing element to the second housing element. A housing for a mobile device, comprising: a first housing component including an acoustic sensor; a second housing component mechanically coupled to the first housing component to form the mobile The housing of the device, wherein the second housing element includes: a continuous vertical member for defining a substantially sealed acoustic chamber; an audio port disposed on a sensor that is acoustically coupled to the acoustic sensor null space; an internal vertical element disposed within the acoustic chamber and defining a rear volume with the continuous vertical element, wherein the internal vertical element further includes: an opening configured for gas exchange; and a sound-resistance insert that completely covers the opening; a plurality of sound-absorbing particles positioned within the rear volume; an acoustically transparent material that is mechanically coupled to the continuous vertical element and the top portion of the inner vertical element , and enclosed with the continuous vertical element and the inner vertical element for retaining the sound-absorbing particles within the rear volume; the sound-transparent material and the acoustic sensor are disposed side by side within the acoustic chamber; and a chamber liner, It is arranged on the top portion of the continuous vertical element, wherein a thickness of the chamber liner determines the size of a restriction through which gas exchange is facilitated; wherein the acoustic sensor is located between the first housing element and the second housing element. occupy this sensor space when coupled together. The mobile device casing of claim 16, further comprising a sound port pad interposed between the acoustic sensor and the sound port disposed in the second housing element, wherein the sound port pad is Configured to seal the sound port from the rear volume upon joining the first housing element to the second housing element. A mobile device casing as claimed in claim 16, wherein the low sound resistance insert and the sound transparent material in the inner vertical element each comprise one or more of a cashmere material or a mesh material. The casing of a mobile device as claimed in claim 16, wherein the rear volume portion of the acoustic chamber is partially filled with a zeolite having substantially spherical particles having a minimum diameter of at least 300 microns and a maximum diameter of 900 microns. Based sound-absorbing particles.