Hearing device with analog filtering and associated method

A hearing device comprising:

• a microphone for converting audio into an audio signal;
• a preprocessing unit for analog processing of the audio signal, wherein the preprocessing unit is coupled to the microphone;
• an A/D converter for converting the processed analog audio signal into a digital audio signal, wherein the A/D converter is coupled to the preprocessing unit;
• and
• a processing unit for digital processing of an output from the A/D converter, wherein the processing unit is coupled to the preprocessing unit;
• wherein the preprocessing unit is configured to apply a first transfer function to the audio signal in a first mode of operation, or a second transfer function with a cutoff frequency to the audio signal in a second mode of operation;
• wherein the processing unit is configured to send a control signal to the preprocessing unit to switch from the first mode of operation to the second mode of operation when a noise criterion is fulfilled.

A hearing device comprising:

• a microphone for converting audio into an audio signal;
• a preprocessing unit for analog processing of the audio signal, wherein the preprocessing unit is coupled to the microphone;
• an A/D converter for converting the processed analog audio signal into a digital audio signal, wherein the A/D converter is coupled to the preprocessing unit;
• and
• a processing unit for digital processing of an output from the A/D converter, wherein the processing unit is coupled to the preprocessing unit;
• wherein the preprocessing unit is configured to apply a first transfer function to the audio signal in a first mode of operation, or a second transfer function with a cutoff frequency to the audio signal in a second mode of operation;
• wherein the processing unit is configured to send a control signal to the preprocessing unit to switch from the second mode of operation to the first mode of operation when a noise criterion is fulfilled.