Cardiac Microphone Size Of Pin Head
PHILADELPHIA. June 21. Medical science has developed a tiny microphone, smaller than a pin head, which can be inserted into the heart so that doctors can locate the exact spot and record the precise sound of cardiac trouble. The device, produced at the Philadelphia General Hospital by Dr. David H. Lewis, has been described as a miniature “transducer” —a$ medical application of naval acoustic technology developed for anti-submarine warfare.
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Press, Volume XCIII, Issue 28002, 23 June 1956, Page 9
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75Cardiac Microphone Size Of Pin Head Press, Volume XCIII, Issue 28002, 23 June 1956, Page 9
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