Accession Number : AD0851655

Title :   Performance Characteristics of a Parabolic and a Conical Underwater Acoustic Reflector.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Gregory, J. B.

Report Date : 07 APR 1969

Pagination or Media Count : 14

Abstract : The beam patterns of a parabolic and a conical underwater acoustic reflector of comparable size, using the same source transducer, showed the paraboloid to exhibit superior performance. Relatively soft foam-rubber backing appears suitable for depths to at least 90 ft. Use of secondary reflectors, i.e., front disk baffles to reduce side lobes, was found to have little or no beneficial effect on either the cone or the paraboloid performance. Results of experimentation with the paraboloid indicated an optimum point at which acoustic performance and physical size became a tradeoff. (Author)

Descriptors :   *REFLECTORS), (*UNDERWATER SOUND EQUIPMENT, CONICAL BODIES, PARABOLIC BODIES, FOAM RUBBER, PERFORMANCE(ENGINEERING).

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE