Electrical audio signal processing systems and devices – Stethoscopes – electrical
Patent
1996-01-04
1998-11-03
Isen, Forester W.
Electrical audio signal processing systems and devices
Stethoscopes, electrical
A61B 704
Patent
active
058320938
ABSTRACT:
The present invention is directed to an assembly used for modifying an ordinary acoustic stethoscope to an electronically amplified stethoscope. This assembly is mechanically married to a conventional stethoscope's tubular structure. An earpiece unit which replaces the standard earpiece on the earpiece-end of the ordinary acoustic stethoscope, is positioned so the standard air column response of any ordinary acoustic stethoscope is picked up by a microphone placed inside this special earpiece unit, thus capturing the acoustic output of the parent stethoscope and transmitting it back to a preamplifier/amplifier and frequency equalizer unit (graphic equalizer). The electronic signal is then directed to a speaker located in the special earpiece unit for monitoring by the operator, or alternatively, such signal is directed to a number of other remote units for the purpose of facilitating teaching and learning.
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P.M. Thorpe; "The Deaf Doctor", Aug. 19, 1978, SA Med. Journal pp. 326-328.
Stethoscopic & Phonoaudio Devices: Historical & Future Perspectives by Michael B. Selig, Nov. 18, 1992, vol. 126,#1, Amer. Heart Jnl.
Bernstein Leonard M.
Bernstein Leslie H.
Bernstein Neil D.
Bernstein Paul L.
Isen Forester W.
Moetteli John
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