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An acoustic survey of beaked whales at Cross Seamount near Hawaii
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10.1121/1.3050317
/content/asa/journal/jasa/125/2/10.1121/1.3050317
http://aip.metastore.ingenta.com/content/asa/journal/jasa/125/2/10.1121/1.3050317
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Waveform and (b) spectrogram (Hann window, 60 sample fast Fourier transform, 59 sample overlap) of the echolocation sweep. (c) Mean received spectrum level for 20 of the highest amplitude echolocation sweeps, with 10% and 90% shown as dashed lines and bandwidth after applying the instrument frequency response function. The waveform shown in (a) and the spectrogram (b) are not corrected for instrument response and thus correspond more or less to the signal to noise ratio of the signal, given the instrument response approximately corresponds to the change in ocean ambient noise with frequency. The spectra (c) has been corrected for instrument frequency response.

Image of FIG. 2.
FIG. 2.

Daily presence of frequency swept sounds (42 063 verified detections) plotted as the percentage of intervals in the night which contains one or more detections using a smoothing filter. Percentage is calculated starting at sunset, ignoring fractional hours near sunrise. Each time window containing a beaked whale sound was counted, the integer total of these being divided by the integer number of hours in the night.

Image of FIG. 3.
FIG. 3.

The diel pattern is shown for all beaked whale sounds. The gray shaded regions show the seasonal range of sunrise and sunset times. The hour of day is in GMT.

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/content/asa/journal/jasa/125/2/10.1121/1.3050317
2009-02-01
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: An acoustic survey of beaked whales at Cross Seamount near Hawaii
http://aip.metastore.ingenta.com/content/asa/journal/jasa/125/2/10.1121/1.3050317
10.1121/1.3050317
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