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Description of sounds recorded from Longman’s beaked whale, Indopacetus pacificus
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Figures

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FIG. 1.

(Color online) Sounds attributed to Longman’s beaked whale, including: (a) 15 kHz click, (b) 25 kHz click, and (c) 25 kHz frequency-modulated (FM) pulse. For each type, waveform (with normalized amplitude versus time), spectrogram (100 points FFT, 99% overlap), and normalized mean spectra (solid line is click amplitude, dashed line is normalized ambient amplitude; 10-pole Butterworth bandpass filter 3–200 kHz) are given.

Image of FIG. 2.

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FIG. 2.

(Color online) Burst pulse sound recorded in the presence of Longman’s beaked whale. Clicks are apparent in the (a) waveform; (b) banding in spectrogram represents click intervals (192 kHz sample rate, 4 096 FFT, Hann window).

Image of FIG. 3.

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FIG. 3.

(Color online) Low-frequency clicks recorded in the presence of Longman’s beaked whale. Clicks are apparent in the (a) waveform and (b) spectrogram (192 kHz sample rate, 4 096 FFT, Hann window).

Tables

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TABLE I.

Signal characteristics (median values and 80% confidence intervals) for three types of Longman’s beaked whale clicks and pulses.

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/content/asa/journal/jasa/130/5/10.1121/1.3646026
2011-10-06
2014-04-16

Abstract

Sounds from Longman’s beaked whale, Indopacetus pacificus, were recorded during shipboard surveys of cetaceans surrounding the Hawaiian Islands archipelago; this represents the first known recording of this species. Sounds included echolocation clicks and burst pulses. Echolocation clicks were grouped into three categories, a 15 kHz click (n = 106), a 25 kHz click (n = 136), and a 25 kHz pulse with a frequency-modulated upsweep (n = 70). The 15 and 25 kHz clicks were relatively short (181 and 144 ms, respectively); the longer 25 kHz upswept pulse was 288 ms. Burst pulses were long (0.5 s) click trains with approximately 240 clicks/s.

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Scitation: Description of sounds recorded from Longman’s beaked whale, Indopacetus pacificus
http://aip.metastore.ingenta.com/content/asa/journal/jasa/130/5/10.1121/1.3646026
10.1121/1.3646026
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