FAA Office of Aerospace Medicine
Civil Aerospace Medical Institute

Report No: DOT/FAA/AM-68/03

Title and Subtitle: Biomedical applications of a commercial capacitance transducer

Report Date: March 1968

Authors: Podolak E, Kinn JB, Westura EE

Abstract: A capacitive displacement transducer with a linear response and constant sensitivity for a frequency range of 0-1,000 Hz is described. Its application to measurement of chest wall motions was verified using static displacements from flat and curved surfaces and both metal and human tissue. The transducer has been used to obtain recordings of apex motion, heart sounds, brachial and radial pulses.

Key Words: Medical equipment, transducers, thorax, sensitivity, extremely lowfrequency, capacitors, recording systems, motion

No. of Pages: 12