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Antinoise Characteristics of Differential Microphones

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2 Author(s)
Ellithorn, H.E. ; University of Notre Dame, Notre Dame, Indiana; and Electro-Voice, Inc., South Bend, Indiana ; Wiggins, A.M.

The operation of the differential, microphone is described, and the noise discrimination of differential microphones operating on various orders of pressure gradients is obtained. Equations of the discrimination against random sounds are developed for both theoretical and practical microphones. Curves are drawn, showing discrimination versus frequency. The noise discrimination of the nth-order pressure gradient is obtained as the ultimate in differential-type microphones.

Published in:

Proceedings of the IRE  (Volume:34 ,  Issue: 2 )

Date of Publication:

Feb. 1946

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