Fixed sound source localization in reverberant environments using a multi–microphone set

Hamid Meraoubi , Bachir Boudraa

The aim of this study is the implementation of algorithms for locating a fixed sound source using a set of 4 microphones, arranged in a linear geometry and whose inter-microphone distances are known. The first results concern the duration of treatments to detect the arrival direction of the incident wave in reverberant environments. In the series of tests conducted in this work, we keep constant both the sampling frequency (Fe= 44100Hz) as soon as the distance d between microphones. Then, we vary the angle of incidence of the sound signal. The tests were repeated for different lengths of analysis windows. The tests were carried out in a reverberant room and with a significant background noise. As the most applications are conducted in reverberant rooms, the signals received by a sensor are the sum signals provided by both the direct path and the reflected ones through walls or other obstacles. The present study helps us to rapidly locate a fixed source for treatment times of 1*N to 20*N ( N=1024 samples ). So, the good detection of a sound source in a reverberating room is obtained by taking only the beginning of the recording files corresponding to the 4 microphones of the array.

Mots clés: MICROPHONES ARRAY; CSP; REVERBERATION; treatment times

Domaines: Acoustique [physics.class-ph]

Hamid Meraoubi, Bachir Boudraa. Fixed sound source localization in reverberant environments using a multi–microphone set. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811343⟩