Method and apparatus for determining an amplification factor of a hearing aid device
View Patent ↗An amplification factor for a hearing aid device is generated by way of the following steps: forming a numerator, wherein the numerator includes a total with a first total component which is formed by means of multiplication of a strength of an approximately undisturbed signal with a first weighting and a second total component, which is formed by multiplication of a strength of a disturbed signal with a second weighting; forming a denominator, which includes the numerator as a first summand and a strength of an interference signal as a second summand. The amplification factor is finally determined by forming a quotient from the numerator divided by the denominator. An apparatus is configured to implement and carry out the novel method.
1. A method of determining an amplification factor of a hearing aid device, the method which comprises:
determining a strength of an approximately undisturbed signal;
determining a strength of an interference signal;
determining a strength of a disturbed signal;
generating the amplification factor from the strength of the undisturbed signal, the strength of the interference signal, and the strength of the disturbed signal, by:
forming a numerator, the numerator including a total with a first total component formed by way of a multiplication of the strength of the approximately undisturbed signal with a first weighting and a second total component formed by way of a multiplication of the strength of the disturbed signal with a second weighting;
forming a denominator, the denominator including the numerator as a first summand and the strength of the interference signal as a second summand;
determining the amplification factor by forming a quotient from the numerator divided by the denominator; and
setting an amplification of the hearing aid device with the amplification factor and amplifying an input signal of the hearing aid device in accordance with the amplification factor.
2. The method according to claim 1 , which comprises determining the second weighting by subtracting the first weighting from a constant value.
3. The method according to claim 1 , which comprises selectively performing one or more of the following:
manually setting the first weighting;
setting the first weighting by way of an automatic controller or a closed-loop controller;
manually setting the second weighting; and/or
setting the second weighting by way of an automatic controller or a closed-loop controller.
4. The method according to claim 1 , wherein at least one of the following is true:
the approximately undisturbed signal is a band-restricted part of a first signal, the interference signal is a band-restricted part of a second signal, and/or the disturbed signal is a band-restricted part of a third signal.
5. The method according to claim 1 , which comprises deriving the approximately undisturbed signal from a first signal received from a first spatial direction, and determining the interference signal from a second signal received from a second spatial direction that deviates from the first spatial direction from which the first signal is received.
6. The method according to claim 5 , wherein the second spatial direction is opposite to the first spatial direction.
7. The method according to claim 5 , which comprises deriving the disturbed signal from a third signal received with a directional selectivity that is less than a directional selectivity with which the second signal is received.
8. The method according to claim 5 , which comprises deriving the disturbed signal from a third signal received with a directional selectivity that is less than a directional selectivity with which the first signal is received.
9. The method according to claim 5 , wherein at least one of the first signal, the second signal, or the third signal is an acoustic signal acquired by way of a hearing aid device.
10. An apparatus, comprising a processing device configured to implement the method according to claim 1 .