Abstract
How sounds from human activities affect behavior of marine mammals is in focus of many ongoing research projects. An important step in this direction is to develop regional databases of marine mammal vocalizations and sounds generated by human activities and natural sources. Analysis of passive acoustic recordings collected on top of Sur Ridge, near the Point Sur Ocean Acoustic Observatory (OAO), in 2008–2009 is presented. The data have been acquired with high‐frequency acoustic recording package in the 10 Hz–100 kHz frequency band at a 200 kHz sampling frequency. These recordings have been scanned to detect and identify signals from various underwater acoustic sources. Pressure spectrum level has been analyzed in time/frequency space to reveal interannual, seasonal, and diel variabilities, as well as possible correlations of different sounds, with primary focus on anthropogenic sounds and marine mammal vocalizations. [Research supported by US Navy CNO(N45).]
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