Localization of multiple sound sources with two microphones.

摘要: This paper presents a two-microphone technique for localization of multiple sound sources. Its fundamental structure is adopted from binaural signal-processing scheme employed in biological systems the sources using interaural time differences (ITD). The two input signals are transformed to frequency domain and analyzed coincidences along left/right-channel delay-line pairs. coincidence information enhanced by nonlinear operation followed temporal integration. azimuths estimated integrating locations across broadband frequencies speech (the “direct” method). Further improvement achieved novel “stencil” filter pattern recognition procedure. includes due phase delays greater than 2π, which generally regarded as ambiguous information. It demonstrated that stencil method can greatly enhance lateral over direct method. Also di...