Ocean ambient sound: Comparing the 1960s with the 1990s for a receiver off the California coast | Zendy

Rex K. Andrew | Zendy; Bruce M. Howe | Zendy; James A. Mercer | Zendy; Matthew A. Dzieciuch | Zendy

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Ocean ambient sound: Comparing the 1960s with the 1990s for a receiver off the California coast

Author(s) -

Rex K. Andrew,

Bruce M. Howe,

James A. Mercer,

Matthew A. Dzieciuch

Publication year - 2002

Publication title -

acoustics research letters online

Language(s) - English

Resource type - Journals

ISSN - 1529-7853

DOI - 10.1121/1.1461915

Subject(s) - sound (geography) , environmental science , calibration , ambient noise level , oceanography , term (time) , remote sensing , geology , acoustics , meteorology , geography , physics , mathematics , statistics , quantum mechanics

Ocean ambient sound data from 1994 to 2001 have been collected using a receiver on the continental slope off Point Sur, California. A tempo- rary, nearby receiving array was used for calibration purposes. The resulting data set is compared with long-term averages of earlier measurements made with the identical receiver over the period from 1963 to 1965. This compar- ison shows that the 1994 to 2001 levels exceed the 1963 to 1965 levels by about 10 dB between 20 and 80 Hz and between 200 and 300 Hz, and about 3 dB at 100 Hz. Increases in (distant) shipping sound levels may account for this. © 2002 Acoustical Scociety of America

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