Accession Number : ADD001847

Title :   Acoustic Test Method and Apparatus.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Jarzynski,Jacek ; McLelland,Howard B ; Kessler,Hyman

Report Date : 07 Jan 1975

Pagination or Media Count : 8

Abstract : An acoustic testing method and apparatus is disclosed for measuring the ultrasonic speed of sound and the sound absorption of both longitudinal and shear waves in a material as a function of temperature. A supporting device holding a pair of transducers in opposed, parallel relationship is pivotable about two, mutually perpendicular axes to vary the angular positions of the transducer pair for shear wave measurements and to adjust the transducer's relative positions to compensate for wave shift. Test specimens are supported upon a rotatable fixture which fixedly positions them between the transducers. Specimen holders, adapted to be positioned within the rotatable fixture, permit testing of materials which are not normally self-supporting, liquids or materials otherwise adversely affected during testing. Control means are provided to adjust the transducer positions and to change specimens. The test apparatus may be immersed in a suitable fluid.

Descriptors :   *Test equipment, *Acoustic measurement, *Patents, Transducers, Ultrasonic tests, Test methods, Acoustic velocity

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE