Hearing device and method for operating the hearing device

1 . A hearing device, comprising:

a control unit;

a communication frontend having a resonant circuit and a transceiver for communication by way of electromagnetic induction;

said transceiver being configured to be switched over between a first communication channel at a first frequency and a second communication channel at a second frequency, one of said first or second communication channels being a standard channel and another of said first or second communication channels being a demand channel, and said communication frontend having an output detector for measuring an output at a frequency of the demand channel; and

said control unit being configured to switch over said transceiver between said first and second communication channels for selective communication on one of said first and second communication channels, and said control unit being configured to switch over said transceiver from the standard channel to the demand channel when said output detector measures an output above a specified threshold value at the frequency of the demand channel.

2 . The hearing device according to claim 1 , wherein said first communication channel is a near-field communication channel and said second communication channel is a near-field magnetic induction channel different from said NFC channel.

3 . The hearing device according to claim 1 , wherein the first frequency is 13.56 MHz and the second frequency is 10.6 MHz.

4 . The hearing device according to claim 1 , the hearing device being a binaural hearing device with two individual devices, wherein one of said first or second communication channels is configured for communication between said two individual devices.

5 . The hearing device according to claim 4 , wherein said two individual devices are left and right hearing devices of a binaural hearing aid.

6 . The hearing device according to claim 1 , wherein said communication frontend comprises an adjustable clock generator for specifying a clock for said transceiver, and wherein said control unit is configured to adjust the clock of said clock generator in order to switch over said transceiver between said first and second communication channels.

7 . The hearing device according to claim 6 , wherein the clock is configured to be switched over between the first frequency and the second frequency.

8 . The hearing device according to claim 6 , wherein the clock is configured to be switched over between said first and second frequencies and a third frequency, wherein the third frequency so close to one of the first or second frequencies that a sideband with respect to the one of the first or second frequencies lies within a reception frequency band of said transceiver.

9 . The hearing device according to claim 1 , wherein said control unit is configured to switch over said transceiver from the demand channel back to the standard channel after a specified time interval has elapsed or after communication via the demand channel has finished.

10 . The hearing device according to claim 1 , wherein:

said resonant circuit has an adjustable resonant frequency; and

said control unit is configured to adjust the frequency of a currently used communication channel as the resonant frequency of said resonant circuit.

11 . The hearing device according to claim 1 , wherein said resonant circuit has an adjustable resistor and said resonant circuit is configured for load modulation by adjustment of said adjustable resistor.

12 . The hearing device according to claim 1 , wherein:

said transceiver comprises a transmitter having an H-bridge; and

said control unit is configured to actuate said H-bridge to short-circuit said resonant circuit in order to implement load modulation.

13 . The hearing device according to claim 1 , wherein the first frequency and the second frequency are carrier frequencies of said first and second communication channels.

14 . A method for operating a hearing device, the method comprising:

providing the hearing device with a communication frontend, having a resonant circuit and a transceiver, for communication by way of electromagnetic induction;

wherein the transceiver is configured to be switched over between a first communication channel at a first frequency and a second communication channel at a second frequency, one of said first or second communication channels being a standard channel and another of said first or second communication channels being a demand channel, and said communication frontend having an output detector for measuring an output at a frequency of the demand channel;

providing a control unit and using the control unit to selectively switch over the transceiver between the first and second communication channels for selectively communicating on one of the first or second communication channels, and the control unit being configured to switch over said transceiver from the standard channel to the demand channel when said output detector measures an output above a specified threshold value at the frequency of the demand channel.