EXPERIMENTAL STUDY OF ACOUSTIC DIFFRACTION GRATINGS,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 13, 1964
- Accession Number
- AD0602209
Entities
People
- G. A. Sabin