. Elements of acoustical engineering. Electro-acoustics; Sound. 10 D/X CUBE (jl = 0° :: 30* ^v ^ ^ z \ I 5 m a 2 0 r<l tf- .\^ = — 60° ^ \y 90° 's; ^ ^ & r 42?^ J80° o ^ DIRECTION OF •n^ > X '* NORMAL ' \ I _ t_ U. 1 1 J 1 Lj L/X SPHERE , 30° <^ SSBS ss z = , 90° . ISO » s ^ • 120° fr\^_ ^^/^, PLANE WAVE "n • 150° \ —1 9 u L. 1 1 1 L_ .04 .06 Fig. The diffraction of a sound wave by a cylinder, cube and sphere. (After Muller, Black and Dunn.) Another example of difFraction of sound is illustrated by the zone plate shown in Fig. The path lengths of the sou
. Elements of acoustical engineering. Electro-acoustics; Sound. 10 D/X CUBE (jl = 0° :: 30* ^v ^ ^ z \ I 5 m a 2 0 r<l tf- .\^ = — 60° ^ \y 90° 's; ^ ^ & r 42?^ J80° o ^ DIRECTION OF •n^ > X '* NORMAL ' \ I _ t_ U. 1 1 J 1 Lj L/X SPHERE , 30° <^ SSBS ss z = , 90° . ISO » s ^ • 120° fr\^_ ^^/^, PLANE WAVE "n • 150° \ —1 9 u L. 1 1 1 L_ .04 .06 Fig. The diffraction of a sound wave by a cylinder, cube and sphere. (After Muller, Black and Dunn.) Another example of difFraction of sound is illustrated by the zone plate shown in Fig. The path lengths of the sound from the source to the focus varies by an integral wavelength. As a consequence, all the pencils. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Olson, Harry Ferdinand, 1901-. New York, D. Van Nostrand company, inc.
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