Method for the operation of a digital, programmable hearing aid as well as a digitally programmable hearing aid
View Patent ↗A method for operating a digital, programmable hearing aid is provided that uses both a transmission characteristic of a normal amplification as well as a transmission characteristic of a maximum amplification of an audio signal over a frequency range that can be nearly freely configured. Given a modification of the amplification by settings at the hearing aid as well as using parameters that result from the signal processing, the gain for the overall system is always calculated utilizing all parameters and is potentially limited to the maximum amplification at the respective frequency if this would otherwise be exceeded.
1. A method for operating a digital, programmable hearing aid, comprising:
picking up an input signal with an input transducer;
converting the input signal into an audio signal;
processing and performing a frequency-dependent amplification of the audio signal with a signal processing unit;
converting and outputting the audio signal with an output transducer;
setting a maximum-amplification transmission characteristic of a maximum amplification of the audio signal over a frequency range;
determining at least one amplification modification value in at least one frequency range from a parameter that can be set by at least one of a hearing aid user and a parameter that is automatically generated by the signal processing unit;
providing a modified amplification transmission characteristic based on the at least one amplification modification value wherein the modified amplification transmission characteristic intersects the maximum-amplification transmission characteristic at an intersection frequency, the modification amplification transmission characteristic being limited by the maximum-amplification transmission characteristic only above the intersection frequency;
setting a normal-amplification transmission characteristic of a normal amplification over frequency range that determines an initial amplification value for each frequency and serves as a basis for an amplification calculation that includes the modified amplification transmission characteristic used in the processing and performing of the frequency-dependent amplification of the audio signal.
2. The method according to claim 1 , further comprising storing at least one of the maximum-amplification transmission characteristic and the normal-amplification characteristic in a memory.
3. The method according to claim 1 , further comprising:
processing signals in a plurality of parallel frequency channels of the signal processing unit;
separately setting, in at least two of the frequency channels, a transmission characteristic selected from the group consisting of the maximum-amplification transmission characteristic and the normal-amplification transmission characteristic.
4. The method according to claim 3 , further comprising separately setting at least one of a constant normal amplification and a constant maximum amplification for at least two of the frequency channels.