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Towards a Better Assessment of Acoustic Vector Sensors

L. KOENE, M. W. HASKER, A. J. VAN DER WAL

Abstract


In combat situations it is important to locate the positions of enemy marksmen. In principle, it is possible to determine these using microphone arrays. An interesting alternative is using acoustic vector sensors (AVS) instead of conventional microphones. AVS, such as the Microflown, measure the flow of air particles to determine the direction of the sound source. To allow for comparison with these AVS, experiments were performed, in which the direction of the sound source is determined using two measurement condenser microphones. The direction of arrival estimation was accurate to ±1.8 degrees. This is less accurate than the advertised value for the Microflown acoustic vector sensor, viz. less than 1.5 degrees. These measurements can serve as a baseline for accuracy tests with AVS. Similar independent research should be performed with acoustic vector sensors, in order to be able to assess the manufacturer’s claims.

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