THE AMBIENT ACOUSTIC ENVIRONMENT OF SHALLOW WATER OFF FT. LAUDERDALE, FLORIDA
Abstract
The underwater noise at two nearby sites off the Atlantic coast of Florida has been recorded at hourly intervals over periods of several weeks. At these sites, the levels of the noise were found to be highly variable, in keeping with the dynamic, changeable nature of the acoustic environment. Both the statistics of the ambient background in different octave bands, and the characteristics of the sources of noise as determined by listening to the hourly noise samples, have been obtained. For example, biological noise was found to be more prevalent during the night when the tide was high than at other times. Also, in the absence of shipping and biological sources, the level of high frequency noise was found to increase with wind speed, as it is well-known to do in deep water. Still, in spite of the busy, active underwater environment, the noise levels compare favorably with those previously reported for other shallow- water locations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 27, 1970
- Accession Number
- AD0708016
Entities
People
- D. L. Bradley
- R. J. Urick
Organizations
- Naval Ordnance Laboratory