Attenuation of Low-Frequency Sound in the Ocean: NUSC Research Program 1967-1972.
Abstract
During the past five years, the Naval Underwater Systems Center has conducted a series of experiments to study the attenuation of low-frequency sound in sea water. The report reviews each of these investigations and the techniques employed and traces their respective contributions to the current understanding of sound attenuation in the ocean. Experimental evidence suggesting the probable existence in sea water of a relaxational process around one kHz is reinforced by recent laboratory measurements involving boron-borate reactions. Results of measurements in major ocean areas of the world show generally consistent values of low-frequency attenuation, thereby permitting use of simple empirical formulas for adequate prediction at frequencies above 100 Hz. At longer wavelengths, the exact behavior of the coefficients remain poorly defined. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 04, 1974
- Accession Number
- AD0774884
Entities
People
- David G. Browning
- William H. Thorp
Organizations
- Naval Underwater Systems Center