Patent ID: 8165317

Claim:
A method for detecting the position of a sound source using two microphones, the method comprising the steps of: emitting a first sound (reproduced sound) from the sound source; detecting the first sound and a second sound (observed sound) at two microphones; converting the first sound and the second sound into electrical signals by the microphones; transforming the signals of the first and the second sounds into frequency spectra by a frequency spectrum transformer apparatus; calculating Crosspower Spectrum Phase (CSP) coefficients of the frequency spectra of the signals by a CSP coefficient calculator apparatus; tracking maximum values of the CSP coefficients using time as a variable; transforming the maximum values into distance information; and calculating distances between the position of the sound source and the positions of the microphones based on the calculated CSP coefficients by a distance calculating apparatus and based on the distance information, thereby determining a position of the sound source.