Accession Number : AD0759026

Title :   Detection of Sound Radiation from Plates Using Long Wavelength Acoustical Holography.

Descriptive Note : Technical memo.,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK ORDNANCE RESEARCH LAB

Personal Author(s) : Watson,E. Eugene

Report Date : 17 AUG 1971

Pagination or Media Count : 90

Abstract : The experimental work reveals active acoustic sources from vibrating plates. The techniques used is a holographic procedure which has been especially designed to study long wavelengths emanating from an acoustic source. A detailed procedure is outlined showing the steps used to obtain the location of the acoustic sources of four vibrating plates and two speakers. The results of the increase in the interval of each scanning line demonstrates the effect on the reconstructed image, showing the feasibility of using a nine-minute scanning time as opposed to a three-hour time limit used for former work. (Author Modified Abstract)

Descriptors :   (*ACOUSTIC DETECTORS, STEREOPHOTOGRAPHY), ACOUSTIC SIGNALS, SOURCES, IMAGES, EXPERIMENTAL DESIGN, THESES

Subject Categories : Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE