Patent ID: 8340321

Claim:
A method for phase-sensitive processing of sound signals of at least one sound source, comprising: arranging two microphones (MIK 1 , MIK 2 ) at a distance d from each other; capturing sound signals with both microphones, and generating associated microphone signals; and processing the sound signals of the microphones; wherein during a calibration mode, the method comprises: defining at least one calibration position of a sound source; capturing separately the sound signals for the calibration position with both microphones, and generating associated calibration microphone signals for the calibration position; determining the frequency spectra of the associated calibration microphone signals; calculating a calibration-position-specific, frequency-dependent phase difference vector φ 0 ( f ) between the associated calibration microphone signals from their frequency spectra for the calibration position; the method further comprising, during an operating mode: capturing the current sound signals with both microphones and generating associated current microphone signals; determining the current frequency spectra of the associated current microphone signals; calculating a current, frequency-dependent phase difference vector φ(f) between the associated current microphone signals from their frequency spectra; selecting at least one calibration position; calculating a spectral filter function F depending on the current, frequency-dependent phase difference vector and the respective calibration-position-specific, frequency-dependent phase difference vector of the selected calibration position; generating a signal spectrum S of a signal to be output by multiplication of at least one of the two frequency spectra of the current microphone signals with the spectral filter function F of the respective selected calibration position, the filter function being chosen so that the smaller the absolute value of the difference between current and calibration-position-specific phase difference for the corresponding frequency, the smaller the attenuation of spectral components of sound signals; and obtaining the signal to be output for the respective selected calibration position by inverse transformation of the generated signal spectrum.