Acoustic change detection algorithm using an FM radio

Geoffrey H. Goldman; Owen Wolfe

doi:10.1117/12.918299

26 May 2012 Acoustic change detection algorithm using an FM radio

Geoffrey H. Goldman, Owen Wolfe

Proceedings Volume 8382, Active and Passive Signatures III; 83820P (2012) https://doi.org/10.1117/12.918299
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

The U.S. Army is interested in developing low-cost, low-power, non-line-of-sight sensors for monitoring human activity. One modality that is often overlooked is active acoustics using sources of opportunity such as speech or music. Active acoustics can be used to detect human activity by generating acoustic images of an area at different times, then testing for changes among the imagery. A change detection algorithm was developed to detect physical changes in a building, such as a door changing positions or a large box being moved using acoustics sources of opportunity. The algorithm is based on cross correlating the acoustic signal measured from two microphones. The performance of the algorithm was shown using data generated with a hand-held FM radio as a sound source and two microphones. The algorithm could detect a door being opened in a hallway.

Citation Download Citation

Geoffrey H. Goldman and Owen Wolfe "Acoustic change detection algorithm using an FM radio", Proc. SPIE 8382, Active and Passive Signatures III, 83820P (26 May 2012); https://doi.org/10.1117/12.918299

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