Patent ID: 7957543

Claim:
A method for processing an analog acoustic signal, particularly for processing an audio signal in a listening device, the method comprising: converting the analog acoustic signal into a digital signal; and processing the digital signal for specific blocks of input data at a block processing frequency, wherein said processing of said digital signal results in a noise signal superposed on the digital signal, the processing comprising: converting the digital signal from a time domain into a frequency domain, splitting the frequency domain of the digital signal into a plurality of frequency bands, each frequency band being processed separately, determining the frequency bands affected by the noise, and filtering, in each determined frequency band, said noise signal out of said digital signal after said conversion of the digital signal into the frequency domain, wherein converting the digital signal from a time domain to a frequency domain includes determining a complex transformation value, where said noise signal is, for each determined frequency band, filtered out of said complex transformation value by subtracting a first correction value from a real part of said complex transformation value to obtain a corrected real value and by subtracting a second correction value from an imaginary part of said complex transformation value to obtain a corrected imaginary value, and when the absolute value of the corrected real value is below a predetermined threshold value, the frequency band is determined to include the noise signal.