Accession Number : ADD004213

Title :   Ultra Low Frequency Acoustic Generator.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Wallen,Albert E

Report Date : 14 Jun 1977

Pagination or Media Count : 7

Abstract : An underwater, ultra low frequency acoustic signal projector utilizes a pneumatically powered signal generator wherein slide and poppet valves cooperate to effect pressure excursions on a piston connected to a water contacting signal generating piston. The generator is constantly pneumatically referenced to ambient hydrostatic pressures by a pressure equilibrium control system. A compressor recycles generator exhaust to provide substantially bubble free operation. (Author)

Descriptors :   *Patents, *Acoustic equipment, *Sonar projectors, Ultralow frequency, Pneumatic devices, Pneumatic valves, Pistons, Deep water, Bubbles, Pressure distribution

Subject Categories : Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE