TWI353580B - Acoustic device - Google Patents

Description

1353580 IX. Description of the invention: [Technical field to which the invention pertains] In particular, the present invention relates to a sound generating device for a carbon tube of a sounding device. [Prior Art] > Sounding device is generally composed of a signal input device and a sounding element. An electrical signal is input to the sounding element through the signal input device to generate a sound. First, the sounding component of the former technical order is - the speaker. The speaker is an electroacoustic device that converts an electric number into a sound signal. Specifically, the speaker can convert a range of audio electric power signals into a audible sound having a small distortion and sufficient sound pressure level by a transducing mode. ^ There are many types of speakers in the past, and they are divided into electric speakers, electromagnetic speakers, electrostatic speakers, and piezoelectric speakers according to their working principles. _The way they work is not @, but it is generally achieved by generating mechanical vibrations to push the surrounding air and causing the air medium to fluctuate to achieve the "electricity-force-sound" conversion. It makes electric speakers the most widely used. Referring to Fig. 1, the prior electric speaker 100 is generally composed of three parts: a voice coil 102, a magnet 1〇4, and a diaphragm 106. The voice coil 1〇2 usually uses a current-carrying conductor. When an audio current signal is input to the voice coil 1〇2, the voice coil 102 corresponds to a current-carrying conductor. Due to the principle of moving the magnetic field generated by the magnet 1 〇 4 according to the action of the current-carrying conductor in the magnetic field, the voice coil 102 is subjected to a magnitude proportional to the audio current and the direction varies with the audio current. The power of change. Therefore, the voice coil 1〇2 generates vibration under the action of the magnetic field generated by the magnet 104, and drives the diaphragm 1〇6 1353580 to vibrate, and the air before and after the (four) 106 also vibrates, converting the electrical signal into a 'sound wave direction. Radiation around. However, the structure of the electric speaker 1GG is complicated, and it must operate under magnetic conditions. Since the early 1990s, nanomaterials represented by carbon nanotubes (see Helical microtubules of graphitic carbon, Nature, Sumio Iijima, vol 354, P56 (1991)) have caused people with their unique structure and properties. Greatly shut down. In recent years, as the carbon nanotubes and the material research materials have been broken, the wide-ranging continually appears to be embarrassing. For example, due to the unique electromagnetic, optical, mechanical, and chemical properties of nanocarbon officials, a large number of applications related to field emission electron sources, sensors, new optical materials, and soft ferromagnetic materials are constantly being studied. Report. However, in the prior art, no carbon nanotubes have been found in the field of acoustics. In view of this, it is necessary to provide a sound generating device which is simple in structure and can be operated under non-magnetic conditions. SUMMARY OF THE INVENTION A sounding device includes: a signal input device; and a f element that is electrically connected to both ends of the signal input device; the sounding element is at least partially disposed on a support a structural surface, the acoustic element G is included in the layer of carbon nanotube film, the carbon nanotube film comprises a preferred orientation of the carbon nanotubes, and the signal input device inputs the number: the sounding element is passed through The sounding element heats the surrounding gaseous medium to praise the sound waves. The lower jaw has advantages over the sounding device provided by the technical solution of the prior art. First, since the sounding element in the sounding device only includes the 1353580 m carbon tube film, no complicated structure such as a magnet is needed, so The structure of the sounding device is relatively simple, which is advantageous for reducing the cost of the sounding device. Secondly, the sounding device uses the input signal to cause the temperature of the sounding element to change, thereby rapidly expanding and contracting the surrounding gas medium, thereby generating sound waves without a diaphragm, and the sounding device composed of the sounding element can be in a non-magnetic condition. jobs. Third, because the carbon nanotube film has a small heat capacity and a large specific surface area, and the carbon nanotubes in the carbon nanotube film are preferentially oriented, after the input signal, according to the signal intensity (such as current intensity) The change, the sounding element composed of at least one layer of carbon nanotube film can (4) heat the gaseous medium, rapidly rise and fall temperature, produce periodic temperature changes, and perform rapid heat exchange with the surrounding gaseous medium to rapidly expand the surrounding gaseous medium. The clothes and the contraction emit a sound that can be perceived by the human ear, and the sound emitted has a wide frequency range and a good sounding effect. In addition, when the thickness of the sound emitting element is relatively small, for example, less than 1 〇 micrometer, the sounding element has a high transparency, so that the formed hair (four) is set as a transparent sounding device, and can be placed on the display surface of the mobile phone display screen or oil painting. Surface = seed ς = transparent sounding device. Fourthly, because of the good machine and the nature of the carbon nanotubes, the nanocarbon tube composed of the preferred orientation of the carbon nanotubes has a good frequency strength (four): it is beneficial to prepare the carbon nanotube film. The various shapes of the composition, two = f, are conveniently applied to various fields. Fifthly, since the sounding element is at least partially disposed on the surface of the supporting structure, the sounding element can be used as a signal input with a higher incineration intensity to enhance the sounding effect of the sounding device. 0 1353580 [Embodiment] Combined with the detailed description of the sounding device of the embodiment of the technical solution

Referring to FIG. 2, a first embodiment of the present technical solution provides a sounding device 10, which includes a signal input, an acoustic component H, a support structure 16, a first electrode 142, and a first electrode. The sound emitting element 14 is disposed on a surface of the support structure 16. The first electrode 142 and the = electrode (4) are spaced apart from each other at the both ends or surfaces of the sound emitting element 14 and are electrically connected to the sound emitting element 14. The first electric 142 and the second electrode 144 are electrically connected to both ends of the signal input device 12 through an external wire 149 for inputting an electrical signal in the signal input device n to the sound emitting element 14 in. The support structure 16 mainly serves as a support, and its shape is not limited. Any object having a certain shape (4), such as a wall or a table top, can be used as the support structure 16 of the present invention. Specifically, the support structure 16 may be a planar structure or a curved structure and have a surface. At this time, the sound emitting element 14 is directly disposed and attached to the surface of the support structure Μ. Since the sound-emitting element 14 is entirely supported by the support structure 16, the sound-emitting element 14 can withstand a high-strength stitching person and thus has a relatively high sounding intensity. The material of the support structure 16 is not limited and may be a hard material such as diamond, glass or quartz. Additionally, the support structure 16 can also be a flexible material such as a plastic or a resin. Preferably, the material of the support structure 16 should have better thermal insulation properties to prevent the heat generated by the sound generating element 14 from being absorbed by the support structure 16 through 1,353,580 degrees, failing to achieve the purpose of heating the surrounding gaseous medium to sound. In addition, the support structure 16 should have a relatively thick (four) surface, so that the sound-emitting element 14^ or other external medium disposed on the surface of the support structure 16 can have a larger contact area, thereby improving the degree of the defect. The sounding effect of the sounding device 10 will be described. The sounding element 14 includes at least one layer of carbon nanotube film. The nano stone back tube film comprises a plurality of carbon nanotubes arranged in a preferred orientation. The nanocarbon film can be obtained by pulling directly from an array of carbon nanotubes. Referring to FIG. 3 and FIG. 4, further, the carbon nanotube film 141 includes a plurality of end-to-end and aligned carbon nanotube bundles 143, each of which has substantially the same length and a nanometer. Both ends of the carbon tube bundle 143 are connected to each other by Van der Waals force. The carbon nanotube bundle 143 includes a plurality of nano-junctions 14 5 of equal length and arranged in parallel with each other. The carbon nanotube film 141 obtained by directly drawing from a carbon nanotube array can be further treated by a volatile organic solvent, and the surface volume ratio of the treated carbon nanotube film 141 is reduced to 'viscosity. Reduced, and its mechanical strength and toughness are enhanced. The carbon nanotube film 141 has a thickness of 0.5 nm to 1 mm. The sound emitting element 14 has a thickness of 0.5 nm to 1 mm. Further, the sounding element 14 includes at least two layers of carbon nanotube film 141 disposed one on top of the other, and adjacent carbon nanotube films 141 are tightly coupled by van der Waals force. The number of layers of the carbon nanotube film 141 in the sound emitting element 14 is not limited, and the arrangement direction of the carbon nanotubes 145 in the adjacent two layers of the carbon nanotube film 141 has an angle of intersection α, α. It is greater than or equal to 0 degrees and less than or equal to 9 degrees, which can be prepared according to actual needs. When the sounding element 14 comprises a multilayer nanocarbon 1353580 tube film, since the adjacent two layers of carbon nanotube film are tightly bonded by van der Waals force, the sounding element 14 itself has good self-supporting performance. The carbon nanotubes 145 in the carbon nanotube film 141 may be one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, and a multi-walled carbon nanotube. The single-walled carbon nanotube has a diameter of 〇·5 nm to 5 〇 nanometer, and the double-walled carbon nanotube has a diameter of 1.0 nm to 5 〇 nanometer, and the multi-walled carbon nanotube The diameter is from 1.5 nm to 50 nm. The length and width of the sound-emitting element 14 composed of at least one layer of carbon nanotubes are not limited, and may be prepared according to actual conditions. In the embodiment of the technical solution, the sound emitting element 14 has a length of 3 cm, a width of 3 cm, and a thickness of 5 〇 nanometer. When the thickness of the sound emitting element 14 is relatively small, for example, less than 1 μm, and the sound emitting element has a transparency of 1 3 , the sound emitting device transparent sounding device 1G using the sound emitting element can be directly mounted on various display devices and mobile phones. The display surface of the display or the surface of the oil painting is used as a space-saving transparent hair supply 10.

Since the nano- Official has a large specific surface area, the nano-carbon film itself has good adhesion under the action of Van der Valli, so the at least-layer carbon nanotube film is used as the vocal element # 14 The crucible and the support structure 16 may be directly bonded. Further, a cow may further include a bonding layer (not shown) between the sounding element U and the support structure 16. The bonding layer may be disposed on a surface of the utterance element = 4. The bonding layer can better the sound producing element w = the surface of the support structure 16. The material of the adhesive layer may be "absolute"; or it may be a material having a certain electrical conductivity. In this embodiment,

11 The knot layer is a layer of silver glue. It is to be noted that the first electrode 142 and the second electrode 144 are formed of a conductive material, and the shape structure of the image is not limited. Specifically, the first electrode 142 and the second pole 144 may be selected in a layer shape, a rod shape, a block shape or the like. The material of the first electrode 142 * the second electrode 144 may be selected from a metal, a conductive paste, a metallic carbon tube, indium tin oxide (ITO), or the like. The first electrode (4) and the second electrode 144 are used to effect electrical connection between the signal input device η and the sound emitting element 14. The first electrode 142 and the second electrode ^4 are electrically connected to the sound emitting element 14, respectively. Since the sound emitting element 14 " is further disposed on the surface of the support structure 16, the first electrode and the second electrode 144 may also be fixedly disposed at both ends or surfaces of the sound emitting element. The arrangement of the first electrode 142 and the second electrode 144 is related to the arrangement direction of the carbon nanotubes in the sound emitting element 14, and at least a portion of the carbon nanotubes are along the direction from the first electrode 142 to the second electrode 144. extend. In the embodiment of the present invention, the first electrode 142 and the second electrode 144 are rod-shaped metal electrodes. The first electrode 142 and the second electrode 144 are spaced and fixed at both ends of the sound emitting element 14 and All of the carbon nanotubes in the sounding element extend in the direction of the first electrode 142 to the second electrode 144. Since the first electrode 142 and the second electrode 144 are spaced apart, the sound emitting element 14 can be applied to a certain value when the sound emitting device 1 is applied to avoid a short circuit phenomenon. Since the carbon nanotube has a large specific surface area, the carbon nanotube film itself has good adhesion under the action of van der Waals force, so when the at least one layer of carbon nanotube film is used as the sounding element 14, The first electrode 142 and the second electrode 144 and the sound emitting element 14 can be directly adhered

12 Fixed and formed a reported electrical contact. ^ Step: The first electrode 142 and the second electrode 144 and the "theft may further include a conductive bonding layer (the unfolded layer may be disposed on the sounding element... surface 2 = bonding layer in While the first electrode 142 and the second electrode (4) 142 are in pure 4 electrical contact, the first electrode may also be

The first electrode 144 is better positioned on the surface of the sound emitting element 14. In this embodiment, the conductive bonding layer is a layer of silver paste. It can be understood that the first embodiment of the present technical solution can further provide a plurality of electrodes on the surface of the phonology section 14, the number of which is not limited, and only needs to ensure that any two adjacent electrodes are spaced apart from each other and the sounding component The electrical connections may be electrically connected to both ends of the signal input device 12, respectively.

It can be understood that since the sound emitting element 14 is disposed on the surface of the support structure 16, the first electrode 142 and the second electrode 144 are optional structures. The signal input device 12 can be electrically connected to the sound emitting element 14 directly via a wire 149 or an electrode lead. It is only necessary to ensure that the signal input device 12 can input an electrical signal to the sound emitting element 14. Any manner in which the electrical connection between the signal input device 12 and the sound producing element 14 can be achieved is within the scope of the present technical solution. The signal input by the signal input device 12 includes an alternating current signal or an audio electric signal or the like. The signal input device 12 is electrically coupled to the first electrode 142 and the second electrode 144 via a wire 149 and inputs an electrical signal into the sound emitting element 14 through the first electrode 142 and the second electrode 144.

13 1353580. When the sound generating device 10 is used, since the carbon nanotube film has a small heat capacity and a large specific surface area, and the carbon nanotubes in the carbon nanotube film are preferentially aligned, after inputting the signal, According to the change of signal intensity (such as electric (four) degrees), the sounding element composed of at least one layer of carbon nanotube film can uniformly heat the surrounding gas medium, rapidly rise and fall temperature, generate periodic temperature changes, and the surrounding gaseous medium. The rapid heat exchange makes the surrounding gas medium expand and contract rapidly, and the sound that the human ear can perceive is emitted, and the sound of the sound is wide and the sounding effect is good. Therefore, in the embodiment of the technical solution, the sounding principle of the sounding element 14 is "electric heating sound" conversion, and has a wide range of applications. Fig. 5 is a graph showing the frequency response characteristic of the sound emitting device 1 时 when a four-layered carbon nanotube film having a length and a width of 3 mm is used as the sounding element 14. As can be seen from FIG. 5, the sounding intensity of the sounding device 1〇 can reach a sound pressure level of 105 decibels, and the sounding frequency ranges from 丄Hz to 1 million Hz (ie, 1 Hz to 10 kHz), and the sounding device 1 〇 has a good vocal effect. Further, the sound-emitting element 14 in the embodiment of the present technical solution has better toughness and mechanical strength. The sound-emitting element 14 can be conveniently fabricated into the sound-emitting device 10 of various shapes and sizes, and the sound-emitting device 1 can be conveniently Used in a variety of sound-emitting devices, such as audio, mobile phones, MP3, MP4, television, and other electronic fields and other sounding. Referring to FIG. 6, a second embodiment of the present invention provides a sounding device 20, which includes a signal input device 22, a sounding device 24, a supporting structure 26, a first electrode 242, and a second electrode. 244, a third electrode 246 and a fourth electrode 248. 1353580 The sounding device 20 in the second embodiment of the present technical solution is basically the same as the sounding device 10 in the first embodiment, except that the sound emitting element 24 in the second embodiment of the present technical solution is disposed around the support structure 26. 'Forming an annular sounding element 24. The shape of the support structure 26 is not limited to any three-dimensional structure. Preferably, the support structure 26 is a cube, a cone or a cylinder. In the embodiment of the technical solution, the support structure 26 is a cylinder. The first electrode 242, the second electrode 2, and the third electrode 2 are spaced apart from the fourth electrode 248 at the surface of the sounding element 24 and electrically connected to the sound emitting element 24. Any two adjacent electrodes are electrically coupled to both ends of the signal input device 22, respectively, such that the sounding element 24 between adjacent electrodes is connected to the input signal. Specifically, two electrodes that are not adjacent are first connected by wires 249 and then electrically connected to one end of the signal input device 22, and the remaining two electrodes are connected by wires 249 and the other end of the signal input device 22 Electrical connection. In the embodiment of the present invention, the first electrode 242 and the third electrode 246 may be electrically connected to one end of the signal input device 22 after being connected by a wire 249 #, and then the second electrode 244 * fourth. The electrode wires are electrically connected to the other end of the signal input device 22 after being connected. The above connection method can realize the parallel connection of the thin carbon nanotubes between adjacent electrodes. The parallel carbon nanotube film has a small resistance to reduce the operating voltage. Moreover, the above-described connection mode allows the sound-emitting element 24 to have a large radiation area and the sound-emitting intensity is enhanced to achieve a surround sounding effect. It can be understood that the present technical solution can set a plurality of electrodes, the number of which is not limited, and only needs to ensure that any two adjacent electrodes are spaced apart from each other and the uttered element

15 c S 1353580 pieces 24 are electrically connected, and are respectively electrically connected to both ends of the signal input device 22. Referring to FIG. 7, a third embodiment of the present invention provides a sounding device 30, which includes a signal wheeling device, a sounding component 34, a support structure 36, a first electrode 342, and a second Electrode 344. The sounding device 3 in the second embodiment of the present technical solution is basically the same as the sounding device 10 in the first embodiment, except that the sound emitting element 34 in the second embodiment of the present technology is partially disposed in the The surface of the support structure 36 forms a sound-sounding space between the surface of the sound-emitting element 34 and the support structure %. The resulting sounding space can be a closed space or an open space. The support structure 36 can be a V-shaped or U-shaped structure or a cavity having a narrow opening. When the support structure 36 is a cavity having a narrow opening, the sounding element 34 can be tiled and fixed on the opening of the cavity to form a Helmholtz resonant cavity. The material of the support structure 36 is wood, plastic, metal or glass. In the embodiment of the technical solution, the supporting structure 36 is a V-shaped structure, and the sound emitting element 34 is disposed at two ends of the V-shaped structure, that is, extending from one end of the v-shaped structure to the other end, so that the The sounding element 34 is partially suspended so as to form a sound-sounding space between the surface of the sound-emitting element 34 and the support structure 36. The first electrode 342 and the second electrode 344 are spaced apart from each other on the surface of the sound emitting element 34. The first electrode 342 and the second electrode 344 are electrically connected to both ends of the signal input device 32 after being connected to the wire 349. The v-shaped support structure 36 can reflect sound waves of the sound-emitting element 34 on one side of the support structure 36 to enhance the sounding effect of the sound-emitting device 30.

16 1353580 The sounding device provided by the embodiment of the present technical solution has the following advantages: the sounding device in the sounding device only includes a carbon nanotube film, and no other complicated structure such as a magnet is needed, so the structure of the sounding device is relatively Simple, it is beneficial to reduce the cost of the sounding device. Secondly, the sounding farm uses the input signal to cause the temperature of the sounding element to change, thereby rapidly expanding and contracting the surrounding gas medium, thereby generating sound waves without a diaphragm, and the sounding device composed of the sounding element can be in a non-magnetic condition. Work under. Third, since the carbon nanotube film has a small heat capacity and a large specific surface area, and the carbon nanotubes in the carbon nanotube film are preferentially oriented and a part of the carbon nanotubes are arranged along the direction from the first The direction from one electrode to the second electrode extends after the input signal, and the sounding element composed of at least a layer of carbon nanotube film uniformly heats the surrounding gas medium and rapidly rises and falls according to the change of the signal intensity (such as current intensity). Produce periodic temperature changes and perform rapid heat exchange with the surrounding gaseous medium to rapidly expand and contract the surrounding gaseous medium, giving the human ear a perceptible sound, and the frequency range of the emitted sound = wide (10) The sound effect is better. In addition, when the thickness of the vocal element is relatively small, for example, less than 1G micrometer, the sounding element has a relatively transparent transparency, so the sounding device formed is a transparent sounding device: 2 can be installed on various display devices, mobile phone displays The display of the screen is checked = the surface serves as a transparent sounding device for saving. Fourth, because of the better mechanical strength and the characteristics of the second official, the carbon nanotube film consists of at least two layers of carbon nanotubes arranged along the same, two = optimal orientation: better mechanical The strength and purity are good, and the secret resistance is good, so that the various shapes and sizes of the carbon tube thin crucible are favorable, and the preparation is convenient and convenient.

17 c S 1353580 is used in various fields. Fifthly, since the carbon nanotube film is obtained by drawing from a direct carbon nanotube array, the carbon nanotube film has better viscosity and steepness, thereby facilitating preparation of a large-area sounding element and sounding device. . It is: when the support structure is a plane, the sounding element is directly disposed and attached to the surface of the support structure, so the sounding element can withstand a higher intensity signal input, thereby having a higher sounding Strength;# When the support L is configured as a V-shaped, U-shaped structure or a cavity having a narrow opening, the sound-emitting element portion is disposed on the surface of the support structure to form a sound-sounding space 'the support structure The _ wave emitted by the hair element can be reflected to enhance the sounding effect of the sounding device. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application in this case. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. Lu [Simple Description of the Drawings] Fig. 1 is a schematic structural view of a speaker in the prior art. 2 is a schematic structural view of a sound emitting device according to a first embodiment of the present technical solution. FIG. 3 is a schematic structural view of a carbon nanotube film in a sound generating device according to a first embodiment of the present technical solution. Fig. 4 is a scanning electron micrograph of a carbon nanotube film in the sound generating device of the first embodiment of the present technical solution. Fig. 5 is a graph showing the frequency response characteristic (S) 18 1353580 of the sounding device of the first embodiment of the present technical solution. Fig. 6 is a schematic view showing the structure of a sound generating device of a second embodiment of the present technical solution. Fig. 7 is a schematic view showing the structure of a sound generating device of a third embodiment of the present technical solution.

[Main component symbol description] Speaker 100 Voice coil 102 Magnet 104 Diaphragm 106 Sounding device 10, 20, 30 Signal input device 12, 22, 32 Sounding element 14, 24, 34 Support structure 16, 26, 36 Carbon nanotube film 141 carbon nanotube bundle 143 carbon nanotube 145 first electrode 142, 242, 342 second electrode 144, 244, 344 wire 149, 249, 349 third electrode 246 fourth electrode 248 (S) 19

Claims (1)

Patent application The invention relates to a sounding device, comprising: a signal input device; and a sounding element 'electrically connected to the two ends of the signal input device; the improvement is that the sounding element is at least partially disposed on a support a structural surface, the sound emitting element comprising at least one layer of carbon nanotube film comprising a plurality of preferred orientations of carbon nanotubes, the signal input device inputting an electrical signal to the sounding element, through the sounding element Heating the surrounding gaseous medium to emit sound waves. The sounding device according to claim 1, wherein the sound emitting element has a thickness of 0.5 nm to L mm. The sounding device of claim 1, wherein the carbon nanotube film further comprises a plurality of end-to-end carbon nanotube bundles each having a substantially equal degree of Both ends of the carbon tube bundle are connected to each other by Van der Waals force. As shown in the third aspect of the patent application, in the first embodiment, each of the bundles is composed of a plurality of mutually parallel carbon nanotubes. The sounding device according to Item 1, wherein the carbon nanotubes in the membrane are one or more of a single-walled carbon nanotube, a double-walled nano-wall, and a multi-walled carbon nanotube. For example, in the fifth section of the patent application scope, the sounding device described in the mouth of the mountain is the diameter of the carbon nanotubes of the premature wall. The diameter of the carbon nanotubes is 4::~ 50 nm, the double-twisted "50 nm, the diameter of the multi-nano-nano 1353580 carbon tube is 1.5 nm ~ 5 〇 nanometer. 7. The sounding device according to claim i, wherein The escaped sound element comprises at least two layers of carbon nanotube film which are arranged in an overlapping manner, and the adjacent two layers of carbon nanotube film are closely aligned by van der Waals force. , " 8. As claimed in claim 7 The sounding device of the present invention, wherein the carbon nanotubes in the adjacent two layers of the carbon nanotube film have an angle of intersection α, αα$9〇. The sounding device according to the first aspect of the invention, wherein the sounding device is directly disposed and attached to the surface of the supporting structure. The material of the support structure is diamond, glass, quartz, plastic or resin. The sounding device of item [i], wherein the support structure is a V-shaped, u-shaped structure or a cavity having a narrow opening through which the sound-emitting element is partially suspended, in the sound-emitting element A sounding device is formed between the support structures. The sounding device of claim 1, wherein the support structure is a three-dimensional structure, and the sound emitting element is disposed around the support structure. The sounding device of claim i, wherein the pair of sound devices further comprises at least two electrodes spaced apart from the surface of the sound emitting element and electrically connected to the sound emitting element. The sounding device of claim 13, wherein the sounding device comprises a -first electrode and a second electrode, the first electricity 21 1353580 • The pole and the second electrode are spaced apart from each other on the surface of the sound emitting element. The sounding device of claim 14, wherein the carbon nanotubes in the sounding element extend in a direction from the first electrode to the second electrode. 16. The sounding device of claim 13, wherein the at least two electrodes are further electrically connected to both ends of the signal input device by wires. The sounding device of claim 16, wherein the sounding device comprises a plurality of electrodes, and the plurality of electrodes are spaced apart and electrically connected to the sounding 7G, and the plurality of electrodes are Any two adjacent electrodes are electrically connected to both ends of the signal input device, respectively. 18. The sounding device according to claim 17, wherein the material of the electrode is metal, conductive paste, metallic carbon nanotube or indium tin oxide. 19. The sounding device according to claim 13, wherein: the sounding device further comprises a conductive adhesive 纴厗 番 电 电, and the mouth layer s is further disposed between the at least two electrodes and the sound emitting element . 20. The utterance device of claim i, wherein the signal input by the signal input device comprises an alternating current signal or an audio telecommunication 22 <