Science: Quiet, Please!

Joe Louis' muscles are not merely bulgy; they are noisy. For, no matter how softly he moves, man in motion is audible: to a sufficiently delicate ear, his muscles rustle and rumble. In the current issue of the Acoustical Society of America's Journal, two audio-scientists, Drs. Wilfred J. Brogden and George A. Miller, describe these minute muscular sounds and how they were first heard.

At Harvard's psycho-acoustic laboratory, the two doctors were working on earphones for the Navy. The listeners began to report strange, crunching sounds whenever they wore special earphones enclosing a small cavity. The sounds were at first discounted as...

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