Q.

What is the thickness of the new acoustic sensor?

A. 0.25 mm
B. 0.5 mm
C. 1.0 mm
D. 1.5 mm
Answer» C. 1.0 mm
Explanation: A new acoustic sensor, which enhances the audibility of heart sounds and enables recording of quantitative acoustic spectral data is described by Kassal et al, 1994. This device is a polymer based adherent differential-output sensor, which is only 1.0 mm thick.
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