Sound Source Detection and Location with CFAR Thresholding
Channel: Kevin Donohue
Date: 2011-08-14

Dynamic sound source detection using partial whitening and a coherent steered response power algorithm with adaptive CFAR thresholding.  28 element irregular microphone array locates voice sounds every 20 ms.  Detections are rendered in above stem plots corresponding to video recording.  False positive threshold set to yield 1.5 false detections per frame.    Dot on 3-D grid represents location, and its size is proportional to excess threshold crossing.  Algorithm and thresholding technique described in:
http://www.hindawi.com/journals/asp/2011/656494/abs/
http://uknowledge.uky.edu/gradschool_theses/46/
Sound track is from beamformed sound based on detected locations.  Original sound track with room effects and amplitude variation can be heard from:
http://www.engr.uky.edu/~donohue/audio/cocktail/camera_mic1.wav
Kevin D. Donohue, Visualization Center, University of Kentucky, August 2011
http://www.engr.uky.edu/~donohue