Accession Number : AD0772789

Title :   A Proposed Tactical Antisubmarine Warfare Service Utilizing Resonant Bubbles.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Wright,Sherman E. , Jr

Report Date : DEC 1973

Pagination or Media Count : 43

Abstract : An experimental investigation was made of the scattering properties of a bubble cloud in a sound field in a fresh water medium. The size of the bubbles was on the order of 0.125 cm radius, and was far above resonant size for the ensonifying sound field. It was determined that the bubbles scattered coherently in the forescatter direction, and incoherently in the backscatter direction. Based upon the scattering properties of the bubble cloud, it appears feasible to develop a device that could have tactical applications in the prosecution of long-range submarine contacts held by active sonars. Such a device would utilize the principle of resonant bubbles, and would require approximately 2.5 cubic feet of air (corrected to STP) to maintain a +20dB target strength for five minutes of continuous operation. (Author)

Descriptors :   *Antisubmarine warfare, *Sonar targets, Antisubmarine aircraft, Bubbles, Backscattering, Target acquisition, Theses

Subject Categories : Undersea and Antisubmarine Warfare
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE