Accession Number : AD0711367

Title :   NEARFIELD AND FARFIELD INVESTIGATION OF THE PERFORMANCE OF PLANAR ARRAYS OF PISTON-TYPE SOUND SOURCES.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS UNIV AUSTIN ELECTRONICS RESEARCH CENTER

Personal Author(s) : Gruber,George J. ; Tseo,Gu-Din

Report Date : 30 MAR 1970

Pagination or Media Count : 165

Abstract : Nearfield and farfield measurements were performed on scale model-linear- and hexagonal underwater sound arrays of acoustically small elements (ka approximately 1). The measurements included the head velocities of the elements, surface pressure and far-field pressure. The linear superposition of the acoustical interaction effects was studied and proved to be valid. A simple method to predict the final velocities of the interacting elements was established by using the modified-transfer-coefficient concept. (Author)

Descriptors :   (*UNDERWATER SOUND GENERATORS, TRANSDUCERS), (*UNDERWATER SOUND, INTERACTIONS), HYDROPHONES, SOUND TRANSMISSION, LOW FREQUENCY, ACOUSTIC IMPEDANCE, ITERATIONS, INTEGRALS, NUMERICAL INTEGRATION

Subject Categories : Electrical and Electronic Equipment
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE