Accession Number:

AD0602209

Title:

EXPERIMENTAL STUDY OF ACOUSTIC DIFFRACTION GRATINGS,

Descriptive Note:

Corporate Author:

NAVY UNDERWATER SOUND REFERENCE LAB MOUNTAIN LAKES N J

Personal Author(s):

Report Date:

1964-07-13

Pagination or Media Count:

8.0

Abstract:

Acoustic diffraction gratings immersed in water were studied experimentally at megacycle frequencies. Directivity patterns show the diffracted beams of a family of copper wire gratings. The usual diffraction grating formula of optics predicts accurately the diffraction angles for the diffracted beams but fails to predict their intensity levels. It is concluded that the sound scattered by the wires contributes significantly, constructively or destructively, depending on phase relations, to the sound diffracted by the slits. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE