Signal processing in a hearing aid
First Claim
1. Device for the signal processing in a hearing aid, comprising a filter for the frequency-dependent amplitude adaptation of an input signal and means for the adaptation of coefficients of this filter in accordance with the input signal, wherein the device comprises a means for determining coefficients of a compression amplification gm, which coefficients describe a frequency-dependent adaptation of the input signal in accordance with frequency-dependent signal levels xn of the input signal, a means for determining coefficients of a noise suppression am, which coefficients describe a frequency-dependent adaptation of the input signal in accordance with interference noises detected in the input signal, wherein the means for the adaptation of coefficients of the filter establishes these coefficients from the coefficients of the compression amplification gm and the coefficients of the noise suppression am.
2 Assignments
0 Petitions
Accused Products
Abstract
In a method and a device for the signal processing in a hearing aid, in which coefficients of a filter for the frequency-dependent amplitude adaptation of an input signal are adapted in accordance with this input signal, the following steps are carried out:
Determining coefficients of a compression amplification gm, which describe a frequency-dependent adaptation of the input signal in accordance with frequency-dependent signal levels of the input signal,
determining coefficients of a noise suppression am, which describe a frequency-dependent adaptation of the input signal in accordance with interference noises detected in the input signal, and
the calculation of the coefficients of the filter (6) cm out of the coefficients of the compression amplification gm and the coefficients am of the noise suppression.
In this, only a single controllable filter is utilised both for the compression amplification as well as for the noise suppression, and a delay time for the filtering of the input signal is kept short.
-
Citations
20 Claims
-
1. Device for the signal processing in a hearing aid, comprising a filter for the frequency-dependent amplitude adaptation of an input signal and means for the adaptation of coefficients of this filter in accordance with the input signal, wherein the device comprises
a means for determining coefficients of a compression amplification gm, which coefficients describe a frequency-dependent adaptation of the input signal in accordance with frequency-dependent signal levels xn of the input signal, a means for determining coefficients of a noise suppression am, which coefficients describe a frequency-dependent adaptation of the input signal in accordance with interference noises detected in the input signal, wherein the means for the adaptation of coefficients of the filter establishes these coefficients from the coefficients of the compression amplification gm and the coefficients of the noise suppression am.
-
10. Method for the signal processing in a hearing aid, in which coefficients of a filter for the frequency-dependent amplitude adaptation of an input signal are adapted in accordance with this input signal, wherein the method comprises the following steps:
-
Determining coefficients of a compression amplification gm, which describe a frequency-dependent adaptation of the input signal in accordance with frequency-dependent signal levels of the input signal, determining coefficients of a noise suppression am, which describe a frequency-dependent adaptation of the input signal in accordance with interfering noises detected in the input signal, and the calculation of the coefficients of the filter out of the coefficients of the compression amplification gm and the coefficients am of the noise suppression. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification