Acoustic eyes: A novel sound source localization and monitoring technique with 3D sound probes
de Bree, H.E.
In this paper the most recent advances are discussed on a new acoustic far field sound source localization technique using (at least) two three dimensional sound probes. The compact and broadband probes are based upon three orthogonally placed acoustic particle velocity sensors (Microflowns) and a single sound pressure sensor. With at least two of these sound probes, placed at a certain distance from each other, sound sources can be localized. Recently, first results of this acoustic eyes concept were presented using a pair of three dimensional probes to monitor and track a low flying helicopter . The measurements are performed in the acoustic far field, combining the function of passive radar for determining and tracking the geometric position of a moving acoustic source relative to the sensor position, with acoustic signature determination. The method is based on a triangulation technique using the particle velocity or sound intensity vectors. The method is broad banded and easy to deploy. Potentially, this method can also be used for sound source localization in wind tunnels and/or car interiors. Obviously, prevailing conditions are different than for outdoor measurements in the acoustic free field. The method will be clearly described and recent progress will be presented with results from real world experiments on acoustic propagation from impulsive and short term stationary sources.
Acoustics and Audiology
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ISMA 2008, Leuven, Belgium, September 2008