Pickup device for picking up vibration transmitted through bones
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United States of America Patent
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-
Jun 24, 1986
Grant Date -
N/A
app pub date -
Apr 27, 1984
filing date -
May 4, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pickup device for picking up vibration transmitted through bones or solid members in human, in which a piezoelectric element is mounted like a cantilever within a substantially rigid liquid-tight case filled with a viscous liquid in such a way that the free end of the piezoelectric element can vibrate with respect to the liquid-tight case. The viscosity of the viscous liquid ranges from 30 to 10,000 cs so that the sharpness of resonance of the piezoelectric element can be suitably suppressed.
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