Space-saving antenna arrangement for hearing aid device
View Patent ↗An antenna coil is present in a hearing aid device to wirelessly transmit signals between a hearing aid device and a further device. Due to the required miniaturization of hearing aid devices, only minimal space is available for the arrangement of the antenna coil in the hearing aid device. The invention therefore provides for winding the antenna coil around or on an existing electro-acoustic transducer in the hearing aid device or around a capsule surrounding the transducer. A comparatively large antenna coil, for which little additional space is required, can thereby be provided in the hearing aid device.
1. A hearing aid device configured to wirelessly transmit data between the hearing aid device and a further device, comprising:
a microphone configured to acquire an acoustic input signal and transduce it into an electrical signal;
a signal processing and control unit configured to process the electrical signal;
a receiver configured to transduce the electrical signal into an acoustic signal; and
an antenna coil that is directly wound on the body of the receiver or the microphone of the hearing aid device, the antenna coil being configured to implement the wireless transmission of data.
2. The hearing aid device according to claim 1 , further comprising:
a compensator configured to compensate a noise signal generated by the receiver and transmitted to the antenna coil.
3. The hearing aid device according to claim 2 , wherein the compensator comprises a compensation coil configured to compensate the electromagnetic field generated by the receiver.
4. The hearing aid device according to claim 3 , further comprising:
at least one of a shielding plate or a shielding capsule that shields or encloses the receiver respectively, the antenna coil being wound on the shielding plate or the shielding capsule, wherein the compensation coil is wound on the receiver, the shielding plate, or the shielding capsule.
5. The hearing aid device according to claim 3 , wherein the antenna coil and the compensation coil are implemented as a coil comprising a center tap.
6. The hearing aid device according to claim 3 , further comprising:
a compensation circuit that modifies an electric receiver input signal according to at least one of an amplitude and phase and feeds into the compensation coil.
7. The hearing aid device according to claim 6 , wherein the compensation circuit is an active filter.
8. The hearing aid device according to claim 7 , wherein the filter comprises an adjustment mechanism configured to permit filter parameters to be adaptively adjusted during operation.
9. The hearing aid device according to claim 6 , wherein the compensation circuit is a passive filter.
10. The hearing aid device according to claim 9 , wherein the filter comprises an adjustment mechanism configured to permit filter parameters to be adaptively adjusted during operation.
11. The hearing aid device according to claim 7 , wherein the filter comprises filter parameters that can be statically selected.
12. The hearing aid device according to claim 9 , wherein the filter comprises filter parameters that can be statically selected.
13. The hearing aid device according to claim 2 , wherein the compensator is an electronic compensator, and further comprises a subtraction filter to compensate the noise signal generated by the receiver and transmitted to the antenna coil.
14. A hearing aid device configured to wirelessly transmit data between the hearing aid device and a further device, comprising:
a microphone configured to acquire an acoustic input signal and transduce it into an electrical signal;
a signal processing and control unit configured to process the electrical signal;
a receiver configured to transduce the electrical signal into an acoustic signal; and
at least one of a shielding plate or a shielding capsule that shields or encloses the receiver respectively, the antenna coil being wound on the shielding plate or the shielding capsule of the hearing aid device.
15. The hearing aid device according to claim 14 , wherein the shielding capsule is comprised of ferrite material, mu-metal, or an iron sheet.