Noise rejecting electronic stethoscope
First Claim
1. An electronic stethoscope comprising a chest piece having a diaphragm, operably connected to a sensor circuit board assembly, containing a top and a bottom surface and also having two piezoelectric polymer sensor elements with one mounted on and electrically connected to each of said top sensor circuit board assembly surface and the other mounted on and electrically connected to the bottom surface, such that vibrational energy impacting on said diaphragm results in dynamic strain on said piezoelectric polymer sensor elements and generation of an electrical signal to a signal output device.
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Accused Products
Abstract
An acoustic-electronic stethoscope that filters aberrant environmental background noise. The chest piece employs acoustic vents to inhibit resonant amplification of noise and contains a diaphragm design that focuses vibrational energy to a raised ring, which transfers and further focuses the energy to a piezoelectric polymer sensor with dual elements. The ensuing electrical signal is then preamplified with the low frequency sound, comprising predominantly background noise, filtered out. The stethoscope contains a binaural head set and output jack for down loading of data. Furthermore, areas normally subject to exposure and damage to water, such as the chest piece and headset, are water-tight.
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Citations
28 Claims
- 1. An electronic stethoscope comprising a chest piece having a diaphragm, operably connected to a sensor circuit board assembly, containing a top and a bottom surface and also having two piezoelectric polymer sensor elements with one mounted on and electrically connected to each of said top sensor circuit board assembly surface and the other mounted on and electrically connected to the bottom surface, such that vibrational energy impacting on said diaphragm results in dynamic strain on said piezoelectric polymer sensor elements and generation of an electrical signal to a signal output device.
Specification