3D sound source localization algorithm and its implementation based on microphone array

Sound source localization based on time difference of arrivals in the acoustic environment is dis-cussed from the systematic perspective.A modified Crosspower-Spectrum Phase(CSP) method is presented for time delay estimation(TDE) while a least mean square(LMS) approach based on the Spherical Interpolation(SI) is followed to derive the source coordinates.To verify the algorithm,a real point source localization system in 3D space is established.Experimental results show that the algorithm gives high accuracy of the source location.