Acoustic Background Measurements with ADA June 1978.
Abstract
The Advanced Detection Array (ADA) at the Marine Physical Laboratory is a high-gain directional receiving array which has been used to observe the background statistics of acoustic noise in the ocean. Background noise data collected over a six-day period in June 1978 is presented. Of interest is not only the power distribution with vertical and azimuthal angle, but also the fluctuation or envelope spectrum of the noise as seen through the highly directional beams. The overhead wind generated noise exhibits a much greater envelope fluctuation than the near horizontal arrival angles where distant traffic sources are observed. Distant traffic sources were always observed even during periods of wind speeds up to 30 knots. Indications are that, if a high-gain array with sufficient directivity to reject overhead wind-generated surface noise is used, the residual noise field in the horizontal angles associated with distant targets will be highly structured and thus would be a prime candidate for adaptive processing techniques.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1981
- Accession Number
- ADA108077
Entities
People
- Victor C. Anderson
Organizations
- Scripps Institution of Oceanography