A beamforming video recorder for integrated observations of dolphin behavior and vocalizations
A beamforming video recorder for integrated observations of dolphin behavior and vocalizations
Date
2005-03
Authors
Ball, Keenan R.
Buck, John R.
Buck, John R.
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DOI
10.1121/1.1831284
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Keywords
Bioacoustics
Biocommunications
Array signal processing
Acoustic correlation
Video recording
Frequency-domain analysis
Acoustic signal detection
Underwater sound
Hydrophones
Biocommunications
Array signal processing
Acoustic correlation
Video recording
Frequency-domain analysis
Acoustic signal detection
Underwater sound
Hydrophones
Abstract
In this Letter we describe a beamforming video recorder consisting of a video camera at the center of a 16 hydrophone array. A broadband frequency-domain beamforming algorithm is used to estimate the azimuth and elevation of each detected sound. These estimates are used to generate a visual cue indicating the location of the sound source within the video recording, which is synchronized to the acoustic data. The system provided accurate results in both lab calibrations and a field test. The system allows researchers to correlate the acoustic and physical behaviors of marine mammals during studies of social interactions.
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Author Posting. © Acoustical Society of America, 2005. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 117 (2005): 1005-1008, doi:10.1121/1.1831284.
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Journal of the Acoustical Society of America 117 (2005): 1005-1008