Ambient Noise Spectrum Levels as a Function of Water Depth.
The results of recent measurements indicate that the level of ambient sea noise is a function of water depth. The results presented in this report were obtained from measurements gathered simultaneously from four hydrophones located in the open ocean, on the slope of a sea mount, in an area of the N...
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| Format: | Text |
| Language: | English |
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1969
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| Online Access: | http://www.dtic.mil/docs/citations/ADA072222 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA072222 |
| Summary: | The results of recent measurements indicate that the level of ambient sea noise is a function of water depth. The results presented in this report were obtained from measurements gathered simultaneously from four hydrophones located in the open ocean, on the slope of a sea mount, in an area of the Northwest Atlantic. The four hydrophones were located in water depths of 400,1100, 2400, and 2500 fathoms. The ambient noise levels are compared to simultaneous wind speed measurements recorded from an anemometer system located on a fixed platform in the area of the hydrophones. The data was obtained during the month of January. Broad band ambient noise levels from the four hydrophone outputs were simultaneously sampled every two hours for a two minute period. The results show a dependence of ambient noise levels as a function of water depth, frequency, and wind speed. |
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