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Noise rejecting electronic stethoscope

Patent image
NMRC

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.

Inventors: 
Kassal, James J.; Russotti, Joseph S.
Patent Number: 
Technical domain: 
Biotechnology and Healthcare
FIle Date: 
2006-10-04
Grant Date: 
2011-08-02
Grant time: 
1,763 days
Grant time percentile rank: 
32
Claim count percentile rank: 
7
Citations percentile rank: 
1
'Cited by' percentile rank: 
2
Assignee: 
US NAVY