Accession Number : AD0260287

Title :   EFFECTS OF MARINE BIOLOGICAL ENVIRONMENT ON COMPLIANT GRATING ACOUSTIC LENSES

Corporate Author : NAVY ELECTRONICS LAB SAN DIEGO CALIF

Personal Author(s) : BARHAM,E.G.

Report Date : 06 MAR 1961

Pagination or Media Count : 1

Abstract : Self-Contained Underwater Breathing Apparatus (SCUBA) observations were conducted on a large, experimental sound device placed in 40 feet of water in San Diego Bay for one month. A succession of fouling populations settled on the equipment, and an attraction to the device by crabs and fish was evidenced. The possible effects of such biota on instrument function are treated on the basis of work published concerning the effects of fouling and other organisms on transducer performance and underwater sound. The existing literature was surveyed to indicate the nature, intensity, and normal seasonal sequence of fouling expected in the coastal waters of the San Diego area. Possible preventive measures are described and discussed. (Author)

Descriptors :   *ACOUSTICS, *FOULING, *LENSES, *MARINE BIOLOGY, *SONAR EQUIPMENT, *UNDERWATER OBJECTS, ECOLOGY, GROWTH(PHYSIOLOGY), LABORATORY ANIMALS, LENS ANTENNAS, SOUND, TEST EQUIPMENT, UNDERWATER SOUND EQUIPMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE