Patent ID: 7149691
Filing Date: 2006-12-12
Classification: G01S,G10L,H04R

Abstract:
1. A virtual environment system, comprising: an acoustic localizer adapted to determine the location of sound sources in a local environment, said acoustic localizer comprising a plurality of microphones arrayed to span the three coordinate axes of a three dimensional space, wherein for each pair of microphones along each coordinate axis, wherein there is a delay difference δ between an arrival time of a sound signal at each microphone of said pair, said sound source location is estimated by forming a surface for each said microphone pair comprising a locus of points that induce said delay difference in said pair of microphones and forming an interception of each surface for each said axis pair to estimate a location of said sound source, wherein an error Δ in one direction for said source location is given by wherein wherein D is a largest distance a microphone pair and said sound source location as projected along said one direction, d is a closest distance between microphone pairs, f is a sampling frequency, and c is a speed of propagation for said sound signal.