Near-field acoustic diffraction and a comparison with electro-magnetic waves

by George Bekefi

Institution: McGill University
Department: Department of Electrical Engineering.
Degree: PhD
Year: 1952
Keywords: Electronics and Electrical Engineering.
Record ID: 1535542
Full text PDF: http://digitool.library.mcgill.ca/thesisfile107464.pdf


The diffraction of an acoustic wave by an aperture in an infinite plane screen is investigated experimentally and theoretically. Measurements are restricted to circular and square apertures illuminated by an acoustic wave of wavelength of about 3 cm. The diffracted field is examined over a considerable range of distances relative to the plane of the aperture.