EP3209032A1 - Loudspeaker module for a hearing aid and hearing aid - Google Patents

Abstract

The invention relates to a loudspeaker module (1) for a hearing aid (2). According to the invention, the loudspeaker module (1) comprises a loudspeaker (3) which has a loudspeaker diaphragm (7) and a drive (8) for the loudspeaker diaphragm (7), and a housing (4) in which the loudspeaker (3) is arranged. Furthermore, the speaker module (1) comprises an antenna unit (5) comprising an antenna coil (20) having a coil axis (22), a tubular coil core (24) forming a sound channel (32), and an antenna base plate (26) a sound opening (30) opening into the sound channel (32) is formed. The antenna coil (20), the coil core (24) and the antenna base plate (26) thereby predetermine an antenna characteristic of the antenna unit (5). The side wall of the housing (4) on the membrane side is formed by the antenna base plate (26).

Description

The invention relates to a loudspeaker module for a hearing aid. Furthermore, the invention relates to a hearing aid with such a loudspeaker module.

The term "hearing aid" includes in particular hearing aid devices that serve people with a hearing loss to compensate for this hearing loss at least partially. For this purpose, hearing aid devices usually comprise as components at least one microphone for recording acoustic sound signals (eg voices, music and / or other environmental noises), a signal processing unit (also referred to as signal processor) for filtering and at least partially amplifying the recorded sound signals and a (usually also as " Handset "speakers) for outputting the processed sound signals to an ear of a hearing aid wearer (ie the person with hearing loss). As an alternative to the loudspeaker, hearing aid devices-depending on the type of hearing loss-include, for example, a bone conduction or cochlear implant for mechanical or electrical stimulation of the hearing center of the hearing device wearer. However, the term "hearing aid" also includes other devices that are used to output (acoustic) sound signals to the hearing of the corresponding hearing aid wearer. Such devices are, for example, so-called tinnitus maskers, headphones, headsets and the like.

A hearing aid, in particular a hearing aid, can be designed, for example, as a single, "monaural" hearing aid for the independent supply of an ear of the hearing aid wearer. In such a monaural hearing aid or hearing aid device usually all components described above are integrated. The hearing aid or hearing aid can also be part of a binaural hearing aid system be. Such a binaural hearing device system is regularly set up to supply both ears of the hearing device wearer. In this case, usually between the two (binaural) hearing aids, a data exchange (signal exchange) takes place, which allows the actual binaural signal processing. Thus, binaural hearing aids are often equipped with signal processing algorithms, by means of which, for example, to generate a directional effect, the sound signals received by both hearing aids are taken into account. For this purpose, the sound signals must be transmitted between the hearing aids recognized.

The data exchange between the two binaural hearing aids is carried out regularly via a radio system. This means that both binaural hearing aids have at least one antenna for transmitting and / or receiving the data to be exchanged. These antennas, however, constitute an additional component to the components described above, which, as is known, must be placed within a hearing aid housing (at least within the installation space available for the hearing aid). In order to maintain a sufficiently high quality with regard to the transmission and reception of the data to be exchanged, however, a certain size (in particular a certain volume) of the antenna can not be exceeded. The space requirement thus required for the antenna, however, runs contrary to the efforts to provide hearing aids of all types (for example, behind-the-ear, in-the-ear or in-channel hearing aids) with ever smaller housing volumes. For other hearing aid components, in particular the speaker, can not be reduced arbitrarily, otherwise the sound quality and the efficiency of the output sound signals would decrease.

However, the sound quality is one of the main quality features that the hearing aid wearer perceives when using a hearing aid. The sound characteristic and the efficiency in low frequencies (and thus the subjectively perceived sound quality) of a loudspeaker is characterized in particular by a back volume (also referred to as "back volume"), which is usually formed by a volume that is opposite to a loudspeaker diaphragm generating the sound signals the environment is demarcated, as well as by a front volume (also referred to as "front volume"), which is arranged between the loudspeaker diaphragm and the sound outlet of the listener or between the sound outlet of the listener and the eardrum. In particular, the ratio of back volume and front volume has an effect on the quality of complaint and the efficiency of the listener. Usually, the term of the front volume refers to the volume between the loudspeaker diaphragm and the sound outlet of the listener. Conventional loudspeakers used in a hearing device are usually arranged inside the hearing device housing and are connected to a sound output of the hearing device housing by means of a sound socket or a sound tube which forms a sound channel. The volume arranged between the loudspeaker diaphragm and the sound outlet therefore consequently represents the front volume in this sense.

The object of the invention is to enable an improved sound characteristic in a hearing device equipped for radio-based data transmission.

This object is achieved by a loudspeaker module with the features of claim 1. Furthermore, the object is achieved by a hearing aid with the features of claim 10. Advantageous and in part inventive embodiments and further developments of the invention are set forth in the dependent claims and the description below explained.

The loudspeaker module according to the invention is set up and provided for use in a hearing device with radio-based data transmission. The loudspeaker module in this case comprises a loudspeaker comprising a loudspeaker diaphragm and a drive for this loudspeaker diaphragm (in the following: diaphragm drive). Furthermore, the speaker module comprises a housing in which the speaker is arranged. The housing preferably encloses the loudspeaker on all sides except for an opening through which acoustic signals can escape into the environment during operation of the loudspeaker. The speaker module also includes an antenna unit for transmitting and / or receiving electromagnetic signals. This antenna unit has an antenna coil with a coil axis and a tubular coil core on which the antenna coil is wound and which forms a sound channel on. The term "tubular" is to be understood without any limitation to a specific cross-sectional shape of the tube. Thus, the tubular extending coil core in particular a square, rectangular, polygonal, oval or round cross-section. In one possible embodiment, the cross-sectional shape varies along the spool core. The antenna coil preferably extends in a straight line along its coil axis. Furthermore, the antenna unit has an antenna base plate, in which a sound passage opening opening into the sound channel of the coil core is formed. The antenna coil, the coil core and the antenna base plate specify an antenna characteristic of the antenna unit. The side wall of the housing on the membrane side - ie the speaker membrane (surface) opposite side wall - is formed by the antenna base plate.

That is, the speaker module is a unit formed of the speaker and the antenna unit, in which the antenna unit is integrated with the case of the speaker. A sound exit opening of the loudspeaker module, by means of which the sound generated by the loudspeaker membrane can be emitted into the environment, is preferably formed by the free end of the sound channel facing away from the antenna base plate (ie arranged at the free end of the coil core). In particular, no additional housing parts are interposed between the loudspeaker and the antenna unit, specifically the antenna base plate.

By "antenna characteristics" is meant here and below in particular features of the antenna unit, such as e.g. a (as low as possible, electrical) transmission power for data transmission to a receiver, a high reception power and a low susceptibility to interference.

Due to the fact that the sound channel is formed by the coil core wound with the antenna coil, it is possible to save space required for a separate antenna and thus the installation space remaining in the hearing aid housing without affecting the volume of the speaker, especially on the back volume, reduced or alternatively a speaker with a correspondingly increased back volume are installed. Due to the fact that the antenna base plate forms a side wall of the loudspeaker housing, the front volume, which is largely formed by the sound channel, can advantageously be reduced in relation to the back volume while maintaining the same antenna volume, in particular with the coil core remaining the same length. The antenna unit moves closer to the speaker membrane. This advantageously reduces the acoustic resistance for the loudspeaker diaphragm and consequently improves the sound characteristic of the loudspeaker. The invention is based on the own knowledge that a reduction of the front volume and an increase of the back volume increases the bandwidth and the efficiency of the speaker in low frequencies. In addition, the loudspeaker can have a higher (sound output) performance with a constant or even reduced size (and in particular with constant electrical power). In addition, the integration of the antenna baseplate into the housing of the loudspeaker module results in an overall shortest possible length of the loudspeaker module (in particular along the coil axis of the antenna coil), which is advantageous with regard to a compact design of the entire hearing device.

In a preferred embodiment, the loudspeaker diaphragm is fastened in the housing in such a way that the sound channel is thereby separated from the interior of the housing. This means that the housing interior forms the back volume. The loudspeaker diaphragm seals the sound channel with respect to the interior of the housing. The loudspeaker diaphragm is moved directly to the antenna base plate except for a necessary oscillation distance. For this purpose, the loudspeaker diaphragm is fastened to the side walls of the housing, for example via a particularly metallic edge region, or it is mounted directly on the antenna baseplate. As a result, on the one hand compared to a conventional speaker construction, in which the loudspeaker diaphragm is clearly offset from the sound channel in the interior of the (usually cuboid) housing spanned while the from the (housing) side walls Surrounding housing interior divided into two sub-volumes, the volume of the loudspeaker from the environment, here specifically the sound channel, separated back volume, especially in relation to the front volume, increases. The front volume is reduced to the volume already present in the spool core. An increased back volume also reduces the acoustic resistance for the speaker diaphragm when generating the acoustic (output) signals. In particular, the bass characteristics of the loudspeaker are improved by an increased back volume.

In a particularly expedient embodiment, the loudspeaker diaphragm is arranged in the coil core (that is to say inside the coil core). Preferably, the speaker diaphragm is arranged radially to the coil axis of the antenna coil. In this embodiment, the back volume is further increased and the sound channel delimited by the loudspeaker diaphragm from the interior of the housing, and thus the front volume arranged in the sound channel, are correspondingly further reduced, so that the sound characteristic of the loudspeaker is further improved. In particular, due to the volume change of the back volume and the front volume advantageously both high and low frequencies can be presented better (preferably with a clear sound).

In a further expedient embodiment, the membrane drive comprises a drive coil with a coil axis. Preferably, the drive coil along its coil axis is in particular straight elongated, that is, the drive coil has in comparison to their extent transverse to the coil axis (also referred to as "thickness") a greater length. The coil axis of the antenna coil is preferably aligned perpendicular to the coil axis of the drive coil in this embodiment. In this case, the antenna base plate is expediently arranged perpendicular to the coil axis of the antenna coil. Characterized in that the antenna coil and the drive coil (or their respective coil axes) are aligned perpendicular to each other, a coupling of the magnetic field generated by this coil in the corresponding other coil is advantageously reduced during operation of the respective coil. In particular, this can be a disturbing induction of currents through the magnetic field of a coil in the other Coil advantageously be reduced. Thus, especially a disturbance of the antenna is reduced by the magnetic field of the drive coil and thus increases the quality of the data transmission of the antenna unit.

In a preferred embodiment of the embodiment described above, the respective coil axes of the antenna coil and the drive coil are perpendicular to each other. In other words, the two coil axes intersect at an angle of 90 °.

In a preferred embodiment, the coil core and the antenna base plate are formed from ferromagnetic and / or ferrimagnetic material. Preferably, the coil core and the antenna base plate are formed from ferrite. Due to the magnetic properties present thereby, both the coil core and the antenna base plate thus contribute particularly advantageously to the antenna characteristic of the antenna unit. In this embodiment, the antenna unit is preferably a magnetic antenna, in particular a "ferrite antenna". Such antennas are advantageously particularly well suited for signal transmission in a frequency range between preferably about 100 kHz to 10 MHz. Namely, these antennas enable data transmission over relatively short distances, such as the order of magnitude of the distance between the two ears of a human being to each other, while at the same time (in particular compared to high-frequency data transmission systems) low electrical power consumption. In particular, the magnetic fields used for data transmission in these antennas are advantageously not or only to a negligible extent dampened by the body tissue (in particular the head) arranged between the transmitting and the receiving antenna in this comparatively low frequency range. In addition, the magnetic antenna advantageously also has a smaller size compared to an antenna for an electric field, which in turn contributes to the saving of installation space. Furthermore, in this embodiment, the antenna base plate advantageously acts as a kind of magnetic shield between the drive coil and the antenna coil. In particular, the antenna baseplate closes due to its to the coil axis of the Drive coil parallel arrangement - and thus their vertical orientation to the antenna coil - the magnetic field of the drive coil at least largely transverse to the coil axis of the antenna coil short, so that a coupling of the magnetic field of the drive coil and thus induced currents in the antenna coil are negligible. Thus, the quality of the data transmission of the antenna unit (in particular their robustness against interfering magnetic fields) is further increased.

In a further expedient embodiment, the coil core of the antenna unit is arranged in particular such that the coil axis of the antenna coil intersects the drive coil. As a result, the shielding effect of the antenna base plate is further improved and thus further reduces the coupling of the magnetic field of the drive coil into the antenna coil.

In a preferred development, the coil core is preferably arranged such that the coil axis of the antenna coil essentially - i. exactly or approximately, in particular with respect to the length of the drive coil by a multiple smaller distance - runs centrally to the drive coil. As a result, an arrangement of the respective magnetic fields of the drive coil and the antenna coil, which is also referred to as "magnetically symmetrical", is advantageously achieved, in particular in combination with the ferromagnetic and / or ferrimagnetic antenna base plate, a particularly high shielding effect or a negligible coupling of the magnetic field of the drive coil is made possible in the antenna coil.

In a further expedient embodiment, the antenna unit comprises at least one antenna side plate, which extends at an angle away from the antenna coil side of the antenna base plate angled to the antenna base plate, preferably perpendicular to this. The respective antenna side plate expediently covers a side wall of the housing (further to the above-described membrane-side side wall). Further, the respective antenna side plate or plates are preferably formed of the same material as the coil core and the antenna base plate. The antenna side plate leads advantageously to an extension of the antenna unit (in particular along the coil axis of the antenna coil) and thus to a further improvement of the antenna characteristic. Further, the magnetic field generated by the antenna coil is guided around the speaker due to the arrangement of the respective antenna side plate. Furthermore, the respective antenna side plate also contributes to the screening effect of the antenna base plate and thus to the shielding of the magnetic field generated by the drive coil relative to the antenna coil.

For further constructional integration of the loudspeaker module, in an expedient development of the embodiment described above, at least one of the further side walls of the housing described above is formed by the or each antenna side plate. This means that this side wall of the housing is eliminated and replaced by the antenna side plate. In the event that the antenna unit in particular comprises four of the antenna side plates described above, these form in the case of the present development, a box-like or cup-like part of the housing.

In a further expedient embodiment, the antenna base plate is connected at a distance, for example in the range of 50 to 150 .mu.m, in particular of about 100 .mu.m, to the spool core and / or optionally to the or the respective antenna side plate. In other words, the antenna base plate, the coil core and optionally the respective antenna side plate or plates are not directly in contact with each other, but are spaced apart from one another and held to one another, for example by means of an adhesive layer and / or different insulating spacers - for example plastic. This advantageously results in a high signal-to-noise ratio of the antenna unit, i. H. achieved a particularly trouble-free reception. The magnetic field of the drive coil of the speaker is shielded from the antenna with better damping.

In a preferred embodiment, the loudspeaker is a so-called "balanced armature" loudspeaker or a "moving" loudspeaker In both cases, the loudspeaker, in particular its diaphragm drive, comprises in addition to the drive coil two permanent magnets and an armature which is arranged in a gap between the two permanent magnets and which is coupled to the loudspeaker diaphragm via a "drive rod" Anchor also passes through the drive coil.

The hearing aid according to the invention comprises a loudspeaker module of the type described above, and preferably a (hearing aid) housing in which the loudspeaker module is arranged. In this case, the loudspeaker module is preferably positioned with its sound channel in a sound exit opening of the hearing device housing.

Fig. 1

in einer schematischen Schnittdarstellung ein Lautsprechermodul für ein Hörgerät,

Fig. 2 bis 5

in Ansicht gemäß Fig. 1 jeweils ein weiteres Ausführungsbeispiel des Lautsprechermoduls, und

Fig. 6

in einer schematisch durchleuchteten Seitenansicht ein Hörgerät mit einem Lautsprechermodul gemäß einem der Ausführungsbeispiele der Fig. 1 bis 5.

Embodiments of the invention will be described in more detail with reference to a drawing. Show:

Fig. 1

in a schematic sectional view of a speaker module for a hearing aid,

Fig. 2 to 5

in view according to Fig. 1 in each case a further embodiment of the loudspeaker module, and

Fig. 6

in a schematically illuminated side view of a hearing aid with a speaker module according to one of the embodiments of the Fig. 1 to 5 ,

Corresponding parts and sizes are always provided with the same reference numerals in all figures.

In Fig. 1 is a speaker module 1 for a (exemplary in Fig. 6 shown) hearing aid 2 shown. The speaker module 1 comprises a speaker 3, which is arranged in a housing 4. Furthermore, the speaker module 1 comprises an antenna unit 5, which is formed as part of the housing 4. The loudspeaker module 1 thus forms an integrated structural unit for the hearing device 2, which serves for the output of acoustic signals as well as for the transmission and / or reception of electromagnetic (data) signals.

The speaker 3 is formed in the illustrated embodiment as a so-called "balanced-armature" loudspeaker. The loudspeaker 3 in this case comprises a loudspeaker diaphragm 7, which is set in vibration during operation of the loudspeaker 3 and thereby generates the acoustic signals. To generate the oscillation of the loudspeaker diaphragm 7, the loudspeaker 3 comprises a (membrane) drive 8. This diaphragm drive 8 has a substantially U-shaped armature 10 (also referred to as "armature") which is connected to the loudspeaker diaphragm 7 by means of a drive rod 12 is coupled. The membrane drive 8 further has two permanent magnets 14, which are arranged at a distance from one another and between which a leg of the armature 10 extends. In addition, the membrane drive 8 comprises a drive coil 16, by means of which a magnetic field for alternating magnetization of the armature 10 is generated during operation of the loudspeaker 3. The drive coil 16 is elongated along a coil axis 18, i. with a larger compared to their thickness longitudinal extent formed.

The antenna unit 5 comprises an antenna coil 20, which is arranged along a (correspondingly assigned) rectilinear coil axis 22, concretely wound. The antenna coil 20 is wound onto a hollow-cylindrical, tubular (antenna) coil core 24, which is formed from ferromagnetic material, specifically ferrite. The coil axis 22 of the antenna coil 20 is aligned perpendicular to the coil axis 18 of the drive coil 16. The antenna unit 5 furthermore comprises an antenna base plate 26, likewise made of ferromagnetic material, specifically ferrite, on which the bobbin 24 - and thus also the coil axis 22 - rises vertically. In the in Fig. 1 embodiment shown, the coil core 24 and the antenna base plate 26 are made in one piece, resulting in a simplified assembly results.

In this case, the antenna base plate 26 forms a side wall of the housing 4 arranged on the membrane side of the loudspeaker 3 - in the exemplary embodiment shown concretely a (top side) cover plate of the housing 4. A to the outlet of the acoustic signals generated by the speaker diaphragm 7 required sound passage opening 30 is formed directly in the antenna base plate 26. This sound passage opening 30 opens into the cylinder interior of the spool core 24. This cylinder interior is hereinafter referred to as sound channel 32. The remote from the antenna base plate 26 free end of the sound channel 32 thus forms a sound outlet opening of the (entire) loudspeaker module. 1

An acoustically advantageous design is achieved in that the loudspeaker diaphragm 7 is arranged in the housing 4 directly at the lower end of the sound channel 32, and thereby the sound channel 32 with respect to the housing interior 34 separates or closes. In the present case, the loudspeaker diaphragm 7 is mounted on the housing 4 via a particularly metallic edge region 33. In an alternative embodiment, the loudspeaker diaphragm 7 is fastened directly to the antenna base plate 26 via the edge region 33. The actual, free-floating membrane is located directly below the sound channel 32. The enclosed by the speaker diaphragm 7 opposite the sound channel 32 housing interior 34 of the housing 4 thus forms the so-called back volume (also referred to as "back volume") of the speaker 3. The in relation to the loudspeaker diaphragm 7 sound-output-side front volume (also referred to as "front volume") is formed essentially by the sound channel 32.

In Fig. 2 is a further embodiment of the speaker module 1 is shown. This embodiment differs from that in FIG Fig. 1 illustrated embodiment, characterized in that the loudspeaker diaphragm 7 is arranged and fixed within the tubular bobbin 24, specifically radially to the coil axis 22. The drive rod 12 is extended accordingly in this case. The arrangement of the loudspeaker diaphragm 7 in the bobbin 24 results according to the embodiment according to Fig. 1 - With otherwise the same dimensions of the speaker module 1 - an enlarged back volume and a reduced front volume. As a result, the acoustic resistance of the loudspeaker diaphragm 7 is advantageously reduced, so that (even if the loudspeaker diaphragm is smaller in size than its surface) 7) the sound characteristic of the speaker 3 can be improved. Thus, the thus configured loudspeaker module 1 advantageously both low and high tones - ie lower and higher frequencies - better transmitted.

The fact that the antenna base plate 26 is formed of ferromagnetic material, this serves on the one hand to improve the antenna characteristics of the antenna unit 5. On the other hand shields the antenna base plate 26, the antenna coil 20 from the outgoing in operation of the speaker 3 from the drive coil 16 magnetic field at least partially.

An improved with respect to the shielding effect of the antenna base plate 26 embodiment of the speaker module 1 is in Fig. 3 shown. In this case, the coil core 24 and thus the antenna coil 20 is positioned on the antenna base plate 26 in such a way that the coil axis 22 of the antenna coil 20 intersects the drive coil 16 of the loudspeaker 3. Specifically, in the in Fig. 3 illustrated embodiment, the coil axis 22 of the antenna coil 20 is aligned centrally to the drive coil 16 and also cuts the coil axis 18 of the drive coil 16 (in the middle of the drive coil 16). This results in a particularly favorable course of the magnetic field of the drive coil 16 (represented by schematically indicated magnetic field lines 40). In the Fig. 3 Upper magnetic field lines 40 (ie, the magnetic coil lines 40 closer to the antenna coil 20) are deflected by the antenna base plate 26 such that they are short-circuited approximately transversely (at right angles) to the coil axis 22 of the antenna coil 20. This results in particularly low interference from the magnetic field of the drive coil 16 to the antenna characteristic of the antenna unit 5. In addition, the coil core 24 with respect to the antenna base plate 26 at a small distance, for example by means of a film positioned. The magnetic field of the drive coil 16 is thereby additionally shielded from the antenna coil 20 with increased attenuation.

An improvement in the shielding effect of the antenna base plate 26, however, already arises when the coil axis 22 of the antenna coil 20 - as in the Fig. 4 and 5 is disposed not centrally of the antenna coil 16 but is positioned so as to intersect the drive coil 16 (in a region between the center thereof and one of the two ends). Thus, advantageously, a compromise between a reduction of interference on the antenna coil 20 by the drive coil 16 and the hearing aids commonly present (usually space-related) constructive restrictions are formed.

As in Fig. 4 is also shown, the antenna unit 5 additionally comprises antenna side plates 42 which are arranged on the antenna coil 20 side facing away from the antenna base plate 26 angled to the latter and placed concretely on the outside of the housing 4. During operation of the antenna unit 5, the antenna magnetic field generated by the antenna unit 20 is advantageously conducted around the loudspeaker 3 through these antenna side plates 42. Furthermore, the antenna side plates 42 also contribute to shielding the magnetic field of the drive coil 15 from the antenna coil 20.

How out Fig. 4 can be further seen, the antenna side plates 42 and the bobbin 24 are each spaced at a small distance from the antenna base plate 26. The corresponding distance is realized for example by an adhesive layer or by an interposed foil.

In a non-illustrated embodiment, the antenna side plates 42 and the bobbin 24, however, are in direct contact with the antenna base plate 26.

In an in Fig. 5 illustrated, another embodiment, the antenna side plates 42 are not placed on the housing 4, but form the respective perpendicular to the antenna base plate 26 side walls of the housing 4 itself. As a result, the occupied volume of the speaker module 1 compared to the embodiment according to Fig. 4 further reduced. In particular, the antenna side plates 42 and the antenna base plate 26 are hereby made as an integral unit.

This in Fig. 6 The hearing device 2 shown represents a so-called in-the-ear hearing device (short ITE hearing aid). The hearing aid 2 comprises a hearing aid housing 50 which is adapted to the shape of the auditory canal of the hearing device wearer and faces away from the eardrum of the hearing device wearer at its intended wearing position End is closed by a front panel (referred to as "face plate" 52). At its in the intended carrying position the eardrum end facing the hearing aid housing 50 has a sound output 54. Housing inside is the speaker module 1 with the sound channel 32 forming bobbin 24 of the antenna unit 5 in this sound output 54 arranged. Also shown is an electronics unit 56, which is circuitry coupled to the speaker module 1 and carries the elements for signal processing.

The object of the invention is not limited to the embodiments described above. Rather, other embodiments of the invention may be derived by those skilled in the art from the foregoing description. In particular, the individual features of the invention described with reference to the various exemplary embodiments and their design variants can also be combined with one another in a different manner.

LIST OF REFERENCE NUMBERS

1

Loudspeaker Module

2

hearing Aid

3

speaker

4

casing

5

antenna unit

7

Speaker cone

8th

diaphragm actuator

10

anchor

12

drive rod

14

permanent magnet

16

drive coil

18

coil axis

20

antenna coil

22

coil axis

24

Plunger

26

Antenna base plate

30

Sound port

32

sound channel

33

border area

34

Housing interior

40

magnetic field line

42

Antenna side plate

50

hearing aid housing

52

face plate

54

sound output

56

electronics unit

Claims (10)

Loudspeaker module (1) for a hearing aid (2), with a loudspeaker (3) having a loudspeaker diaphragm (7) and a drive (8) for the loudspeaker diaphragm (7), - With a housing (4) in which the speaker (3) is arranged, and - comprising an antenna unit (5) comprising an antenna coil (20) with a coil axis (22), a tubular coil core (24) forming a sound channel (32) and an antenna base plate (26) in which a sound channel ( 32) opening sound passage opening (30) is formed, wherein the antenna coil (20), the coil core (24) and the antenna base plate (26) specify an antenna characteristic of the antenna unit (5), wherein the side wall of the housing (4) is formed on the membrane side by the antenna base plate (26). Loudspeaker module (1) according to Claim 1,
wherein the loudspeaker diaphragm (7) is fixed in the housing (4) in such a way that the sound channel (32) is thereby separated from the housing interior (34). Loudspeaker module (1) according to claim 1 or 2,
wherein the speaker diaphragm (7) is disposed in the tubular spool core (24). Loudspeaker module (1) according to one of claims 1 to 3,
wherein the drive (8) of the loudspeaker diaphragm (7) comprises a drive coil (16) having a coil axis (18), and wherein the coil axis (22) of the antenna coil (20) is oriented perpendicular to the coil axis (18) of the drive coil (16) , Loudspeaker module (1) according to one of claims 1 to 4,
wherein the coil core (24) and the antenna base plate (26) are formed of ferromagnetic and / or ferrimagnetic material. Loudspeaker module (1) according to Claim 4 or 5, characterized
wherein the coil core (24) is arranged such that the coil axis (22) of the antenna coil (20) intersects the drive coil (16). Loudspeaker module (1) according to one of claims 4 to 6,
wherein the coil core (24) is arranged such that the coil axis (22) of the antenna coil (20) extends substantially centrally of the drive coil (16). Loudspeaker module (1) according to one of claims 1 to 7,
wherein the antenna unit (5) has at least one antenna side plate (42) which extends on an antenna coil (5) side facing away from the antenna base plate (26) angled to the antenna base plate (26). Loudspeaker module (1) according to Claim 8,
wherein another side wall of the housing (4) is formed by the antenna side plate (42). Hearing aid (2) with a loudspeaker module (1) according to one of claims 1 to 9.

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