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A Perceptual Gain-Control Technique for Bioacoustic Transient Detection

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This paper addresses the problem of detecting finback whale (Balaenoptera physalus) calls-20-30-Hz one-second noise bursts-in a high-noise (0-15-dB SNR) environment. The solution is to compute a spectrogram, apply faster narrow-band loudness masking with loudness normalization, and threshold the output. Test results for several recordings, a comparison with other methods, and limitations of the technique are covered.

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