Accession Number : ADD014703

Title :   Acoustic Transient Generator.

Descriptive Note : Patent, Filed 4 Aug 64, patented 2 Oct 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Elliott, Myron A

Report Date : 02 Oct 1990

Pagination or Media Count : 9

Abstract : This patent pertains to an underwater transient sound generator for broadcasting optimum acoustical sonic energy in sea water with an appropriate intensity and frequency spectrum to achieve passivation of acoustical mines. A high pressure bubble is released from a chamber while a resilient diaphragm is simultaneously vibrated, the diaphragm having at least one of its surfaces in contact with the sea water. The system provides an improved pneumatic-mechanical impact sound source that produces a controllable distribution of high power, broad band spectrum acoustical energy, to temporarily inactivate acoustical mines, while masking the noise of the ship as it passes the mine. Keywords: PAT-CL-367-142. (kr)

Descriptors :   *PATENTS, *UNDERWATER SOUND GENERATORS, ACOUSTICS, BUBBLES, FREQUENCY, HIGH POWER, HIGH PRESSURE, MASKING, MINES(ORDNANCE), NOISE, PASSIVITY, SEA WATER, SHIPS, SOUND GENERATORS, SPECTRA, TRANSIENTS

Subject Categories : Acoustic Detection and Detectors
      Underwater Ordnance

Distribution Statement : APPROVED FOR PUBLIC RELEASE