Hearing aid device

Abstract

The invention discloses a hearing aid device. The hearing aid device comprises a stimulation device; a bridge connector (50); at least one user input unit (4); at least one signal line (16) connecting the at least one user input unit (4) to a control unit for controlling the hearing aid device; the antenna module (1) comprises at least two layers; at least one user input unit (4) is arranged at one of the layers of the antenna module (1); at least one signal line (16) is provided at the inner surface of one of the layers; the bridge-based connector (50) is arranged on a first side of the stimulation device, and the active part of the antenna module (1) is arranged on the side opposite to the first side; the antenna module (1) is composed of a first part (10), an antenna feed connection (12) and an antenna short connection (11) in a first direction perpendicular to the thickness direction of the layered structure, and the antenna feed connection (12) and the antenna short connection (11) are separated by a distance (17) in a second direction perpendicular to the first direction and the thickness direction; at least one signal line (16) is connected via an antenna short connection (11) in one of the inner layers of the layered structure of the antenna module (1).

Description

[0001] This application is a divisional application of Chinese patent application 202011449138.1, filed on December 9, 2020, with the invention name “Hearing Aid Device”. Technical Field

[0002] The present invention relates to hearing aid devices. More specifically, the present invention relates to bone anchored hearing aid devices. Further, the present invention relates to an antenna for use in the aforementioned (bone anchored) hearing aid solutions with a built-in button. Background Art

[0003] In a bone anchored hearing solution (BAHS), it is difficult to achieve the required antenna performance due to the close proximity of components of such hearing aid solutions such as vibrator, battery, printed circuit board (PCB) including electronic components such as buttons and other metal parts. The limited space of the hearing aid solution and the close proximity of its components limit, for example, the antenna bandwidth and antenna radiation efficiency. Furthermore, the performance difference between having a BAHS on the left side of the head and having it on the right side of the head is significant.

[0004] Therefore, there is a need to provide a solution that enables providing an antenna concept that achieves the required antenna performance while integrating the mechanical and electrical concepts of a BAHS in a limited space. Summary of the invention

[0005] The present invention is applicable to a variety of different hearing aid devices. However, the exemplary description is made in conjunction with a bone anchored hearing aid device, which is not limited to other hearing aid devices.

[0006] According to one aspect, a hearing aid device comprises: at least one user input unit for controlling an operating mode of the hearing aid device, at least one signal line connecting the at least one user input unit to a control unit for controlling the hearing aid device, and an antenna module comprising at least two layers that are conductive and electrically connectable and form a layered structure, wherein the control unit is arranged in the hearing aid device. The at least one user input unit is arranged at one of the layers of the antenna module, and the at least one signal line is provided at an inner surface of one of the layers facing the other layer.

[0007] At least one signal line may be provided at a surface of one of the layers facing the other layer, for example at least one signal line may be arranged between the layers.

[0008] This structure enables compact integration of the user input unit and the antenna element without sacrificing antenna performance. Specifically, the layered structure enables electromagnetic shielding between the signal line and the antenna module.

[0009] The antenna module has a first direction perpendicular to the thickness direction of the layered structure, and is composed of a first portion, an antenna feed connection and an antenna short connection, wherein the antenna feed connection and the antenna short connection are separated by a distance in a second direction perpendicular to the first and thickness directions.

[0010] According to another aspect, the radiation and bandwidth performance of the antenna module can be set by at least one of the distance between the antenna feed connection and the antenna short connection in the second direction and the distance between the distal end of the first part of the antenna module and the main ground plane part of the hearing aid device in the first direction.

[0011] The antenna module further comprises a bendable portion connecting the first portion with the second portion in a first direction, wherein the bendable portion is provided at a distal end of the first portion opposite to the antenna feed connection and the antenna short connection, wherein the antenna module further comprises a second portion.

[0012] According to yet another aspect, the radiation and bandwidth performance of the antenna module may also be set by a total length of the antenna module in a first direction consisting of the first portion, the bendable portion, and the second portion of the antenna module.

[0013] This enables providing different antenna configurations, which may be required on the right side of a user's head compared to the left side.

[0014] According to another aspect, one of the two or more conductive layers is a ground layer.

[0015] According to yet another aspect, the antenna short connection is connected to the ground plane.

[0016] According to another aspect, the first portion of the antenna is a planar inverted-F (PIFA) antenna.

[0017] According to a further aspect, the hearing aid device further comprises a stimulation device for converting the sound signal into mechanical vibrations.

[0018] According to another aspect, the stimulation device comprises a first side facing towards a skull of a user of the hearing aid device and a second side facing towards the antenna module.

[0019] According to yet another aspect, at least one user input element is included in a ground layer of the antenna module.

[0020] Through this structure, it is possible to eliminate the influence of at least one user input unit on the radiation and bandwidth performance of the antenna module.

[0021] According to another aspect, at least one signal line is short-circuited through the antenna in one of the inner layers of the layered structure of the antenna module.

[0022] According to yet another aspect, at least one signal line is located in a layer different from the ground layer, and at least one signal line is connected to the ground layer by means of a capacitor.

[0023] According to another aspect, the capacitor is placed at one of the following locations: beside the user input element, beside the bendable portion at the distal end of the first portion of the antenna, or beside the antenna short connection at the main ground plane portion.

[0024] According to another aspect, the antenna module is provided with an inductive element configured to electrically decouple the antenna module from the stimulation device.

[0025] According to a further aspect, the antenna module may include a parasitic element for enhancing the antenna bandwidth. At least one user input unit is provided at one of the layers of the antenna module, and the parasitic element may be formed on the layer. The parasitic element may be a wire formed in the layer or a metal sheet provided on the layer. The parasitic element is inductively connected to the active part of the antenna module. The active part may be formed by the first part of the antenna module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various aspects of the present invention will be best understood from the detailed description below in conjunction with the accompanying drawings. For clarity, the drawings are schematic and simplified, and only the details necessary for understanding the present invention are given, while other details are omitted. Throughout the specification, the same reference numerals are used for the same or corresponding parts. The various features of each aspect may be combined with any or all features of the other aspects. These and other aspects, features and / or technical effects will be apparent from and illustrated in conjunction with the following figures, in which:

[0027] Figure 1 shows a perspective view of a simplified hearing aid device according to an embodiment of the present invention;

[0028] Figure 2A shows an enlarged view of a portion of a simplified hearing aid device according to an embodiment;

[0029] Figure 2B shows a simplified hearing aid device according to an embodiment, Figure 2A The current distribution at 2.44 GHz in the enlarged part;

[0030] Figure 3 shows the current distribution of a simplified hearing aid device at 2.44 GHz according to an embodiment;

[0031] Figure 4 shows an unfolded PCB structure of a simplified hearing aid device according to an embodiment;

[0032] Figure 5 shows a tuning possibility of the antenna characteristics of an unfolded PCB structure of a simplified hearing aid device according to an embodiment;

[0033] Figure 6An antenna structure without a PCB upper layer according to an embodiment is shown;

[0034] Figure 7 Possible locations of capacitors in antenna structures according to embodiments are shown. DETAILED DESCRIPTION

[0035] The detailed description proposed below in conjunction with the accompanying drawings serves as a description of a variety of different configurations. The detailed description includes specific details for providing a thorough understanding of a number of different concepts. However, it is apparent to those skilled in the art that these concepts can be implemented without these specific details. Several aspects of the apparatus and method are described by a number of different blocks, functional units, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). Depending on the specific application, design limitations or other reasons, these elements can be implemented using electronic hardware, computer programs or any combination thereof.

[0036] The electronic hardware may include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), gating logic, discrete hardware circuits, and other appropriate hardware configured to perform a number of different functions described in this specification. Computer programs should be broadly interpreted as instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, programs, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or other names.

[0037] A hearing device may include a hearing aid adapted to improve or enhance a user's hearing ability by receiving an acoustic signal from the user's environment, generating a corresponding audio signal, possibly modifying the audio signal, and providing the possibly modified audio signal as an audible signal to at least one ear of the user. A "hearing device" may also refer to a device such as an earphone or a headset adapted to electronically receive an audio signal, possibly modify the audio signal, and provide the possibly modified audio signal as an audible signal to at least one ear of the user. The audible signal may be provided in the form of an acoustic signal radiated into the user's outer ear, an acoustic signal transmitted to the user's inner ear as mechanical vibrations through the bone structure of the user's head and / or through parts of the middle ear, and an electrical signal transmitted directly or indirectly to the user's cochlear nerve and / or auditory cortex.

[0038] The hearing device is adapted to be worn in any known manner. This may include: i) arranging the unit of the hearing device behind the ear (with a tube directing airborne acoustic signals into the ear canal or with a receiver / speaker arranged close to or in the ear canal), such as a behind-the-ear hearing aid; and / or ii) arranging the hearing device in whole or in part in the pinna and / or ear canal of the user, such as an in-the-ear hearing aid or an in-the-canal / deep-in-the-canal hearing aid; or iii) arranging the unit of the hearing device to be connected to a fixing device implanted in the skull, such as a bone-anchored hearing aid or a cochlear implant; or iv) arranging the unit of the hearing device as a whole or in part implanted unit, such as a bone-anchored hearing aid or a cochlear implant.

[0039] "Hearing system" refers to a system comprising one or two hearing devices. "Binaural hearing system" refers to a system comprising two hearing devices, wherein the hearing devices are adapted to provide audible signals to both ears of a user in a coordinated manner. A hearing system or binaural hearing system may also include an auxiliary device in communication with at least one hearing device, the auxiliary device affecting the operation of the hearing device and / or benefiting from the function of the hearing device. A wired or wireless communication link is established between at least one hearing device and the auxiliary device so that information (such as control and status signals, possibly audio signals) can be exchanged therebetween. The auxiliary device may include at least one of the following: a remote control, a remote microphone, an audio gateway device, a mobile phone, a broadcast system, a car audio system, a music player, or a combination thereof. The audio gateway device is adapted to receive a plurality of audio signals, such as from an entertainment device such as a TV or a music player, from a telephone device such as a mobile phone, or from a computer such as a PC. The audio gateway device is also adapted to select and / or combine appropriate signals in the received audio signals (or signal combinations) to be transmitted to at least one hearing device. The remote control is adapted to control the function and operation of at least one hearing device. The functionality of the remote control may be implemented in a smartphone or another electronic device, which smartphone / electronic device may be running an application for controlling the functionality of at least one hearing device.

[0040] Generally, a hearing device comprises i) an input unit such as a microphone for receiving acoustic signals from the user's surroundings and providing a corresponding input audio signal; and / or ii) a receiving unit for electronically receiving the input audio signal. The hearing device also comprises a control unit for processing the input audio signal and an output unit for providing an audible signal to the user based on the processed audio signal.

[0041] The input unit may include multiple input microphones, for example for providing direction-dependent audio signal processing. The aforementioned directional microphone system is suitable for enhancing a target sound source among multiple sound sources in the user's environment. On the one hand, the directional system is suitable for detecting (such as adaptively detecting) from which direction a specific part of the microphone signal originates. This can be achieved using conventionally known methods. The control unit may include an amplifier suitable for applying a frequency-dependent gain to the input audio signal. The control unit may also be suitable for providing other suitable functions such as compression, noise reduction, etc. The output unit may include an output transducer such as a speaker / receiver for providing an air-borne acoustic signal to the skull percutaneously or transcutaneously, or a vibrator for providing a structure-borne or liquid-borne acoustic signal. In some hearing devices, the output unit may include one or more output electrodes for providing an electrical signal, for example in a cochlear implant.

[0042] It should be understood that, in the following, "disposed at / on", "provided in / on", "contained in", "included in" are used as synonyms.

[0043] Reference now Figure 1 , which shows a perspective view of a simplified hearing aid device according to an embodiment of the present invention. The hearing aid device shown has an antenna module 1, which includes a first part 10. In this embodiment, the antenna module 1 also includes an antenna short connection 11 and an antenna feed connection 12 located at a first direction distal end of the antenna module 1. The first direction is perpendicular to the thickness direction of the antenna structure. In addition, the antenna short connection 11 and the antenna feed connection 12 are separated by a distance in a second direction perpendicular to the first direction and the thickness direction.

[0044] In addition, the antenna module 1 includes a bendable portion 14, which connects the first portion 10 of the antenna module 1 with the second portion 13 of the antenna module 1. The bendable portion 14 is provided in a first direction of the antenna module 1, i.e. at a distal end of the first portion 10 of the antenna module 1, i.e. at an end opposite to the positions of the antenna short connection 11 and the antenna feed connection 12.

[0045] In this embodiment, the second part 13 comprises one or more user input elements 4 (also referred to as buttons). The user input element 4 controls the operating mode of the hearing aid device. The aforementioned operating modes may include, for example, Bluetooth TM , Near Field Communication (NFC), Wi-Fi TM and / or ZigBee TM The button is included in the antenna module 1. In addition, the hearing aid device also includes a signal line (button line) 16 that connects the button to the control unit of the hearing aid device. The signal line is extruded between the layers of the antenna module 1, i.e. provided at the inner surface of one of the layers facing the other layer.

[0046] The antenna module 1 comprises at least two conductive and electrically connectable layers, which form a layered structure. Figure 2A Shows Figure 1 An enlarged view of a portion of the antenna structure marked with "*". Figure 2A As shown in the figure, the antenna of this embodiment is a layered structure (sandwich structure) composed of a three-layer PCB structure in the thickness direction. However, the present invention is not limited thereto. A two-layer, four-layer, five-layer, etc. PCB structure may also be used. In addition, in this embodiment, all layers are connected by a path 15. In addition, one of the multiple layers of the antenna module 1 is a ground layer. In addition, three signal lines 16 for the user input unit 4 are shown. They are provided on the second layer, i.e., the inner layer, of the three-layer PCB structure.

[0047] In the case of a two-layer antenna structure, these signal lines are provided at the inner side of one of the two layers, ie the side of the layer facing the inner side of the other layer. In the case of three or more layers, the signal lines are provided at any inner surface of one of the inner layers.

[0048] Furthermore, the antenna short connection 11 described above is connected to the ground layer.

[0049] In addition, if Figure 1 As shown in , the hearing aid device comprises a stimulation device, such as a vibrator 2 that converts a sound signal into a mechanical vibration. The vibrator 2 has a first side that faces the skull of the user of the hearing aid device. The second side of the vibrator 2 is opposite to the first side of the vibrator 2, and the antenna module 1 is arranged on the second side.

[0050] Furthermore, the hearing aid device comprises a main ground plane portion 3 .

[0051] The hearing aid device includes a bridge base connector 50, which is configured to be connectable to a bridge base fixing structure (not shown) disposed on a recipient's skull. In most cases, the bridge base fixing structure is applied to a screw (not shown), which is screwed into the recipient's skull, and at the same time, the hearing aid device is applied to the bridge base fixing structure via the bridge base connector, and the hearing aid device is configured to apply vibration to the skull via the bridge base fixing structure and the screw. The bridge base connector 50 is disposed on a first side of the vibrator 2, and the antenna module 1 is disposed at least on a second side of the vibrator 2, wherein the first side and the second side are not the same side of the vibrator 2. The antenna module 1 is disposed on a plurality of other sides of the vibrator 2, wherein the other sides are different from the first side. The advantage of arranging the antenna module 1 on a side different from the bridge base connector is that a vibrator that does not provide any shadow effect in a direction away from the skull is obtained. Thus, the radiation efficiency of the antenna module 1 is not affected by the vibrator 2. The bridge base connector 50 is disposed closer to the recipient's skull than the active part of the antenna module 1. In addition, the active part of the antenna module 1 is disposed on the side opposite to the first side. The effect of applying the active portion of the antenna module on the side opposite to the first side rather than on the side not opposite to the first side is that radiation in directions away from the recipient's skull is improved. For example, if the active portion is applied on the side not opposite to the first side, for example if the active portion is pointed downward when the recipient is using the hearing aid device, very limited radiation efficiency will result in an upward direction and in a radial direction parallel to the ear-ear axis portion between the recipient's left and right ears. Whereas, placing the active portion on the opposite side will result in more consistent radiation efficiency in any direction away from the recipient's skull, whether it is upward, downward or radially away from the ear-ear axis.

[0052] Figure 2B Shows Figure 2A The current distribution at a simulation frequency of 2.44 GHz in the enlarged portion of the diagram. The legend on the left hand side indicates the magnetic field strength in A / m. Figure 2A As in FIG. 1 , three signal lines 16 for buttons are also shown. It can be seen that the magnetic field strength on the signal line 16 is negligible.

[0053] Figure 3 Shown as Figure 1 The current distribution of the complete, simplified hearing aid device at a simulation frequency of 2.44 GHz is shown in FIG. Figure 3 As shown in , only the active part of the antenna module radiates. In this embodiment, this part is formed by the first part 10 of the antenna module 1 and is implemented by a planar inverted F antenna (PIFA). Again, the legend on the left hand side indicates the magnetic field strength in A / m.

[0054] In this embodiment, the buttons are included in the ground layer. With this structure, it is possible to eliminate the influence of the buttons on the radiation and bandwidth performance of the antenna module 1. In addition, in another aspect of this embodiment, there is a copper area available near each button. This further improves the radiation and bandwidth performance of the antenna module 1.

[0055] like Figure 3 As shown in , the current distribution is asymmetric around the PCB layer of the antenna, which is inherent to the PIFA current distribution. The current flows in a loop from the antenna feed connection 12 to the ground layer of the antenna. Therefore, a high current density appears on the right side of the antenna module 1 (i.e., the side where the antenna short connection 11 is located). However, current is also available on the left side of the antenna module 1, but the current is smaller.

[0056] In this embodiment, the top of the vibrator 2 (the second side of the vibrator 2) is placed very close to the antenna PCB module 1 (e.g. 3 mm). Thus, a capacitive coupling effect can be seen between the antenna module 1 and the vibrator 2. However, in this embodiment, the vibrator 2 is decoupled and is not part of the configuration of the antenna module 1. For example, for the expected operating frequency of 2.4 GHz, two 33 nH coils can be used for this purpose.

[0057] Figure 4 The PCB layout of all layers when projected onto each other is shown. A specific embodiment is shown in which the first part 10, the second part 13 and the bendable part 14 of the antenna module 1 are folded in a two-dimensional plane. Therefore, Figure 1 can be expressed by Figure 4 The structure is obtained by winding around the vibrator 2 so that the first part 10 is placed above the vibrator 2, that is, on the second side of the vibrator 2, and the second part 13 is bent to the left bottom of the vibrator 2.

[0058] Figure 5 Another view is shown, which again presents the PCB, in which all layers are projected in a two-dimensional plane. In particular, it emphasizes how the radiation and bandwidth performance of the antenna module 1 can be set. In an embodiment, the parameters of the antenna module 1 are determined by the distance 17 between the antenna short connection 11 and the antenna feed connection 12 and the distance 18 between the distal end of the first part 10 of the antenna module 1 and the main ground plane part 3 of the hearing aid device. In addition, in another embodiment, the parameters of the antenna module 1 can also be determined by the total length 19 of the antenna module 1 in the first direction consisting of the first part 10, the flexible part 14 or the second part 13.

[0059] These parameters can be selected and configured according to specific application scenarios, such as according to user needs. For example, if a different antenna configuration is required on the right side of the user's head than on the left side, the corresponding parameters can be adjusted to improve radiation and bandwidth performance.

[0060] exist Figure 6 , the ground layer of the layered PCB layout is shown in dark grey. The signal line 16 extends through the antenna short connection 11 in the middle layer and is extruded between the other layers of the PCB. Therefore, the signal line 16 has no influence on the radiation and bandwidth performance of the antenna module 1. While ensuring very good connections between the layers and keeping the signal line 16 between the layers, the signal line 16 does not affect the radiation or bandwidth performance of the antenna module 1, even if the length of the signal line 16 varies due to the different possible positions of the button. In the case of very long signal lines 16, or if appropriate arrangement in the middle layer is not possible at all, additional capacitors 5 may be used.

[0061] This principle is Figure 7 , where additional capacitors 5 are used to improve the performance of the antenna module 1. They can be placed in a number of different locations between the signal line 16 and the ground plane, such as next to the button, next to the bendable portion 14 at the far end of the first portion 10 of the antenna module 1, or at the main ground plane portion 3 next to the antenna short connection 11. These capacitors typically have a capacitance of 10-15 pF. Thus, for a 6 dB mark, a very good bandwidth of 300 MHz can be achieved.

[0062] Unless expressly stated, the singular forms "one", "the" used herein include the plural form (i.e., have the meaning of "at least one"). It should be further understood that the terms "having", "including" and / or "comprising" used in the specification indicate the presence of the described features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or combinations thereof. It should be understood that, unless expressly stated, when an element is referred to as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate intervening element. As used herein, the term "and / or" includes any and all combinations of one or more listed related items. Unless expressly stated, the steps of any method disclosed herein do not have to be performed in the exact order disclosed.

[0063] It should be appreciated that reference to "an embodiment" or "embodiment" or "aspect" or features that "may" be included in this specification means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. In addition, the specific features, structures or characteristics may be appropriately combined in one or more embodiments of the present invention. The foregoing description is provided to enable those skilled in the art to implement the various aspects described herein. Various modifications will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects.

[0064] The claims are not limited to the various aspects shown herein, but rather have the full scope consistent with the claim language wherein, unless expressly stated otherwise, elements referred to in the singular do not mean "one and only one" but rather "one or more." Unless expressly stated otherwise, the term "some" means one or more.

[0065] Therefore, the scope of the present invention should be judged based on the following claims.

Claims

1. A hearing aid device, comprising: a stimulation device for converting acoustic signals into mechanical vibrations; an abutment connector (50) configured to secure the hearing aid device to the skull of a hearing aid device recipient; at least one user input unit (4) for controlling an operating mode of the hearing aid device; at least one signal line (16) connecting the at least one user input unit (4) to a control unit for controlling the hearing aid device, wherein the control unit is arranged in the hearing aid device; and An antenna module (1) comprising at least two electrically conductive and electrically connectable layers forming a layered structure; wherein at least one user input unit (4) is arranged at one of the layers of the antenna module (1); wherein at least one signal line (16) is provided at an inner surface of one of the layers facing the other layer; wherein the bridge base connector (50) is arranged on a first side of the stimulation device, and wherein the active part of the antenna module (1) is arranged on a side opposite to the first side; wherein the antenna module (1) is composed of a first portion (10), an antenna feed connection (12) and an antenna short connection (11) in a first direction perpendicular to the thickness direction of the layered structure, wherein the antenna feed connection (12) and the antenna short connection (11) are separated by a distance (17) in a second direction perpendicular to the first direction and the thickness direction; At least one signal line (16) is connected through an antenna short circuit (11) in one of the inner layers of the layered structure of the antenna module (1).

2. A hearing aid device according to claim 1, wherein the radiation and bandwidth performance of the antenna module (1) can be set by at least one of a distance (17) between the antenna feed connection (12) and the antenna short connection (11) in the second direction and a distance (18) between the distal end of the first part (10) of the antenna module (1) and the main ground plane part (3) of the hearing aid device in the first direction.

3. A hearing aid device according to claim 1, wherein the antenna module (1) further comprises a bendable portion (14) connecting the first portion (10) to the second portion (13) in the first direction, wherein the bendable portion (14) is provided at a distal end of the first portion (10) opposite to the antenna feed connection (12) and the antenna short connection (11), wherein the antenna module (1) further comprises the second portion (13).

4. A hearing aid device according to claim 3, wherein the radiation and bandwidth performance of the antenna module (1) can also be set by the total length of the antenna module (1) in the first direction consisting of the first part (10), the bendable part (14) and the second part (13) of the antenna module (1).

5. The hearing aid device of claim 1, wherein one of the two or more conductive layers is a ground layer.

6. The hearing aid device according to claim 5, wherein the antenna short connection (11) is connected to a ground plane.

7. The hearing aid device according to any one of claims 1-5, wherein the first part (10) of the antenna is a planar inverted-F antenna.

8. The hearing aid device according to claim 5, wherein the at least one user input element (4) is comprised in a ground layer of the antenna module (1).

9. The hearing aid device according to claim 1, wherein the at least one signal line (16) is located in a layer different from the ground layer, and the at least one signal line (16) is connected to the ground layer by means of a capacitor (5).

10. A hearing aid device according to claim 9, wherein the capacitor (5) is placed at one of the following locations: a location next to the user input unit (4), a location next to the bendable portion (14) at the distal end of the first portion (10) of the antenna module (1), or a location next to the antenna short connection (11) at the main ground plane portion (3).

11. The hearing aid device according to claim 8, wherein the antenna module (1) is provided with an inductive element, which is configured to electrically decouple the antenna module (1) from the stimulation device.

12. The hearing aid device of claim 1, wherein the bridge base connector (50) is arranged closer to the recipient's skull than the active part of the antenna module (1).

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