Acoustical Investigation of the Deep Scattering Layers at the Bermuda Ocean Acre Site in April and November 1969
Abstract
As a part of the Ocean Acre Program, experimental studies of volume reverberation were conducted near Bermuda during April and November of 1969. Downward looking transducers with CW pulse transmissions were used. The spring measurements were made at frequencies of 3.5, 13.5, and 15.5 kHz. The fall measurements were made at 12.0 kHz. The resultant data include frequency comparisons of peak scattering strength versus depth, as well as daily and seasonal comparisons of scattering strength. During the spring studies, daytime scattering at the upper frequencies was greater than that at 3.5 kHz. At nighttime, the reverberation at 3.5 kHz increased to a level comparable with that of the upper frequencies. Daily comparisons of the scattering strength profiles exhibited excellent structural repeatability. The fall reverberation measurements yielded generally greater peak scattering strengths when compared with the spring measurements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 10, 1970
- Accession Number
- AD0721679
Entities
People
- Robert K. Dullea
Organizations
- Naval Underwater Systems Center