Amplified Heart Sounds. Use of the Crystal Microphone.

• 1 February 1935
• journal article
• Published by Frontiers Media SA in Experimental Biology and Medicine
• Vol. 32  (5) , 773-774
• https://doi.org/10.3181/00379727-32-7855p

Abstract

Keywords

• CRYSTAL MICROPHONE
• AMPLIFIED HEART SOUNDS
• USE