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Acoustic Filter for Classroom Use

J. E. White
J. E. White
Research Center, Ohio OH Company, Denver, Colorado (Received December 29, 1954)
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January 01, 2000
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29 December 1954


Many articles and text books have treated acoustic filters from various viewpoints, and acoustic filter experiments have been devised for laboratory courses in acoustics. These experiments frequently point out the analogy between lumped-constant acoustic filters and electrical filters, in order to make use of the many texts and handbooks dealing with electrical filter theory and construction. Although it is clear that electrical filters are designed to operate from a specified source impedance and into a specified load impedance, the laboratory experiments which the author has seen do not apply this requirement to the acoustic filters used. The present article describes an acoustic source with a primarily resistive output impedance, a microphoen assembly which serves as a primarily resistive load impedance and detector, and a low-pass acoustic filter designed to match them. The analogous electrical filter was built, and the performance characteristics of the two filters are compared.

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Society of Exploration Geophysicists Geophysics Reprint Series

Seismic Wave Propagation: Collected Works of J. E. White

J. E. White
J. E. White
Professor Emeritus, Colorado School of Mines
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Society of Exploration Geophysicists
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January 01, 2000




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