Accession Number : AD0769214

Title :   Small, Low-Frequency, Electro-Mechanical Projector Design and Analysis.

Descriptive Note : Research and development rept. Jan-Jun 73,

Corporate Author : NAVAL UNDERSEA CENTER SAN DIEGO CALIF

Personal Author(s) : Knittel,M. R. ; Hunt,J. T. ; Barach,D. ; Holloway,J. W.

Report Date : SEP 1973

Pagination or Media Count : 50

Abstract : Three types of transducers were mathematically modeled to gain knowledge of the potentials and limitations of alternating lead- and ceramic-staved cylinder transducers, curved bender bar transducers, and ribbed-cylinder flextensional transducers. It was determined that bandwidth of alternating lead- and ceramic-staved cylinders can be maximized through careful choice of material composition, ceramic thickness, length-to-diameter ratio, and stave geometry. Analysis of the curved bender bar transducer showed that a small, light-weight, low-power output transducer could be built with an in-air resonance frequency between 100 and 500 Hz. A ribbed-cylinder flextensional transducer is basically a low-frequency narrowband device but modifications can be made to the current design which will lower its first in-air resonance frequency and improve its reliability. (Author)

Descriptors :   (*Transducers, Mathematical models), Very low frequency, Sound, Sources, Underwater sound

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE