Accession Number : AD0838790

Title :   INVESTIGATION OF THE BOUNDARY CONDITIONS APPLICABLE TO UNDERWATER, AIR-BACKED FLEXIBLE-DIAPHRAGM TRANSDUCERS.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Warson, Toby Gene

Report Date : JUN 1968

Pagination or Media Count : 66

Abstract : The operation of the MYLAR electrostatic transducer used as a transmitter is studied theoretically and experimentally. A development is made of the mathematical solutions necessary to map the near field patterns generated by a constant velocity circular piston set on an infinite baffle and also a constant pressure piston in the same circumstances. Boundary conditions applicable to the MYLAR piston are postulated based on equivalent circuits which allow investigation of the theoretical behaviors of the transducer. The postulated boundary conditions are then experimentally investigated. It is shown that an underwater, air-backed, flexible diaphragm transducer very closely approximates a 'constant pressure' source. (Author)

Descriptors :   (*TRANSDUCERS, UNDERWATER), PRESSURE, MATHEMATICAL ANALYSIS, ACOUSTIC PROPERTIES, SOURCES, ELECTROSTATIC FIELDS, GEOMETRY, ELECTRONIC EQUIPMENT, BARIUM COMPOUNDS, TITANATES, OPERATION, POLYESTER PLASTICS, FILMS, CERAMIC MATERIALS, THESES.

Subject Categories : Electrical and Electronic Equipment
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE