Patent ID: 8477964

Claim:
A method comprising: determining, by a device, a current, frequency-dependent phase difference vector between current microphone signals from a frequency spectra of the current microphone signals, the current microphone signals being captured by a first microphone and a second microphone, and the first microphone being positioned a particular distance from the second microphone; selecting, by the device, a calibration position; determining, by the device, a spectral filter function for each of the first microphone and the second microphone, the spectral filter function being determined for each of the first microphone and the second microphone based on the current, frequency-dependent phase difference vector and a respective calibration-position-specific, frequency-dependent phase difference vector of the selected calibration position; generating, by the device, a signal spectrum of a signal to be output by multiplication of at least one of the frequency spectra of the current microphone signals with the spectral filter function of the respective selected calibration position, the spectral filter function being chosen so that a value of an absolute value of a difference between a current phase difference and a calibration-position-specific phase difference for a corresponding frequency is directly proportional to an attenuation of spectral components of sound signals; and obtaining, by the device, the signal to be output for the respective selected calibration position by inverse transformation of the generated signal spectrum.