Open AccessWhistle source levels of free-ranging beluga whales in Saguenay-St. Lawrence marine park
Author(s) -
Olivier Le Bot,
Yvan Simard,
Nathalie Roy,
Jerome Mars,
Cedric Gervaise
Publication year - 2016
Publication title -
hal (le centre pour la communication scientifique directe)
Language(s) - English
DOI - 10.1121/1.4955115]
Subject(s) - beluga whale , beluga , national park , oceanography , geography , fishery , geology , archaeology , arctic , biology
International audienceWild beluga whistle source levels (SLs) are estimated from 52 three-dimensional (3D) localized calls using a 4-hydrophone array. The probability distribution functions of the root-mean-square (rms) SL in the time domain, and the peak, the strongest 3-dB, and 10-dB SLs from the spectrogram, were non-Gaussian. The average rms SL was 143.8 +- 6.7 dB re 1microPa at 1m. SL spectral metrics were, respectively, 145.8 +- 8 dB, 143.2 +-7.1 dB, and 138.5 +-6.9 dB re 1 microPa. 1microPa / Hz at 1m