Accession Number : ADA115619

Title :   Summary Report of Task 384-914.

Descriptive Note : Interim rept. Nov 75-May 82,

Corporate Author : CATHOLIC UNIV OF AMERICA WASHINGTON DC DEPT OF PHYSICS

Personal Author(s) : Ueberall,Herbert

PDF Url : ADA115619

Report Date : 28 May 1982

Pagination or Media Count : 21

Abstract : This Interim Summary Report is intended to serve as a complete index to all research performed from November 1975 up to the present under task NR 384-914 sponsored by the Office of Naval Research, Code 412 (formerly 421), under current Contract N00014-76-C-0430 with the Department of Physics, Catholic University of America, Washington, DC 20064. The project concentrates on a study of the excitation of resonant vibrations in the elastic targets, on how the effects of the resonances manifest themselves in the acoustic echo, and how these phenomena may be used for target identification purposes. The main achievement of the work so far was the isolation of the resonance features in the acoustic scattering process (using a technique first used in nuclear scattering), the establishment of their link to the physical phenomenon of circumferential (surface) waves on the target, and the complete classification of all the individual components that make up the acoustic scattering process on an elastic body.

Descriptors :   *Acoustic scattering, Acoustic resonance, Vibration, Nuclear scattering, Underwater objects, Indexes, Bibliographies

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE