The Microphone for Military and Tonometric Purposes

Abstract

MY attention has just been called to a paper on the microphone, by Prof. W. F. Barrett, in NATURE (vol. xix. p. 12), in which it is asked whether the latter “has ever been tried by military men to detect the mining operations of an enemy?” Will you allow me to state that this application of the microphone suggested itself to me many months ago, and that I have begun to make experiments both in this direction and also with a view to ascertain to what extent sounds can be transmitted to a microphone immersed in water. Unfortunately the pressure of other matters has hindered me from completing the work, which, however, I hope shortly to be able to do.

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CLARKE, G. The Microphone for Military and Tonometric Purposes. Nature 19, 72 (1878). https://doi.org/10.1038/019072a0

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