Method for operating a hearing device and microphone system for hearing device
View Patent ↗A method for operating a hearing device, an associated microphone system comprising at least two omnidirectional microphones, and a hearing device are provided. The microphones emit microphone signals and are electrically interconnected with one another in order to form directional characteristics. A damping of the upper frequency range of the microphone signals is determined from the lower frequency range of the microphone signals. The impression of a wide-band directional microphone is produced as a result.
1. A method for operating a hearing device, comprising:
emitting, by a first omnidirectional microphone, a first microphone signal comprising a first lower frequency range signal and a first higher frequency range signal;
emitting, by a second omnidirectional microphone , a second microphone signal comprising a second lower frequency range signal and a second higher frequency range signal;
forming a directional characteristic signal from the first and second lower frequency range signals; and
determining a damping of the first higher frequency range signal from the first lower frequency range signal and the directional characteristic signal.
2. The method as claimed in claim 1 , further comprising:
emitting a signal that comprises the directional characteristics and is formed from the first and second lower frequency range signals.
3. The method as claimed in claim 2 , further comprising:
damping the first higher frequency range signal to form a first damped higher frequency range signal of the first microphone signal.
4. The method as claimed in claim 3 , further comprising:
adding the damped first higher frequency range signal to the signal comprising directional characteristics for output.
5. The method as claimed in claim 1 , further comprising:
exposing the first higher frequency range signal to a damping signal estimated from a comparison of the first lower frequency range microphone signals with a signal that comprises directional characteristics to form a damped higher frequency range signal.
6. The method as claimed in claim 5 , further comprising
adding the damped higher frequency range signal to the signal comprising the directional characteristics.
7. A microphone system for a hearing device, comprising:
a first omnidirectional microphone that emits a first microphone signal;
a second omnidirectional microphone that emits a second microphone signal;
a first device unit that separates the first microphone signal into a first higher frequency range signal and a first lower frequency range signal and that separates the second microphone signal into a second higher frequency range signal and a second lower frequency range signal;
a second device unit that forms from the first lower frequency range signal and the second lower frequency range signal of the first and second microphone signals, respectively, a lower frequency range directional signal that comprises directional characteristics;
a third device unit that determines a damping signal from a comparison of the first lower frequency range signal of the first microphone signal with the lower frequency range directional signal that comprises directional characteristics;
a fourth device unit that damps the first higher frequency range signal of the first microphone signal with the determined damping signal; and
a fifth device unit that adds the damped first higher frequency range signal and the lower frequency range directional signal to produce a total signal output having directional characteristics in the lower frequency range and damping applied in the higher frequency range.
8. The microphone system as claimed in claim 7 ,
wherein the first device unit includes a crossover network,
wherein the second device unit includes a directional microphone unit,
wherein the third device unit includes a damping estimation module, and/or
wherein the fourth device includes an adjustable damping element.
9. The microphone system as claimed in claim 8 , wherein the fifth device unit includes an adder.
10. A hearing device, comprising
a microphone system, comprising:
a first omnidirectional microphone that emits a first microphone signal,
a second omnidirectional microphone that emits a second microphone signal,
a first device unit that separates the first microphone signal into a first higher frequency range signal and a first lower frequency range signal and that separates the second microphone signal into a second higher frequency range signal and a second lower frequency range signal,
a second device unit that forms from the first lower frequency range signal and the second lower frequency range signal of the first and second microphone signals, respectively, a lower frequency range directional signal that comprises directional characteristics,
a third device unit that determines a damping signal from a comparison of the first lower frequency range signal of the first microphone signal with the lower frequency range directional signal that comprises directional characteristics, and
a fourth device unit that damps the first higher frequency range signal of the first microphone signal with the determined damping signal, and
a fifth device unit that adds the damped first higher frequency range signal and the lower frequency range directional signal to produce a total signal output having directional characteristics in the lower frequency range and damping applied in the higher frequency range.
11. The hearing device as claimed in claim 10 ,
wherein the first device unit includes a crossover network,
wherein the second device unit includes a directional microphone unit,
wherein the third device unit includes a damping estimation module, and/or
wherein the fourth device includes an adjustable damping element.
12. The hearing device as claimed in claim 10 , wherein the fifth device unit comprises an adder.