(a) A circular diaphragm 60 cm in diameter oscillates at a frequency of 25 kHz as an underwater source of sound used for submarine detection.
(a) A circular diaphragm 60 cm in diameter oscillates at a frequency of 25 kHz as an underwater source of sound used for submarine detection. Far from the source, the sound intensity is distributed as the diffraction pattern of a circular hole whose diameter equals that of the diaphragm. Take the speed of sound in water to be 1450 m/s and find the angle between the normal to the diaphragm and a line from the diaphragm to the first minimum.
(b) Is there such a minimum for a source having an (audible) frequency of 1.0 kHz?
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a We use Eq 3612 6 sin sin 122 1450ms ... View full answer
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Authors: Jearl Walker, Halliday Resnick
8th Extended edition
471758019, 978-0471758013
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