Electrical audio signal processing systems and devices – Stethoscopes – electrical
Patent
1992-12-16
1994-09-13
Isen, Forester W.
Electrical audio signal processing systems and devices
Stethoscopes, electrical
A61B 704
Patent
active
053475836
ABSTRACT:
A binaural electronic stethoscope adapted to receive auscultatory sounds from a body and adapted to transmit the auscultatory sounds to a user. A chestpiece is adapted to be utilized in cooperation with the body. An acoustical transducer cooperates with the chestpiece and receives auscultatory sounds and transforms the auscultatory sounds into an electrical input signal. A signal processor processes the electrical input signal to produce an electrical output signal. A first tubular member couples the chestpiece to a housing. A speaker is mounted within the housing and converts the electrical output signal into an acoustical output signal. Second and third tubular members are coupled to the housing and are acoustically coupled to the speaker. First and second earpieces are coupled to the second and third tubular members, respectively, and receive the acoustical output signal and provide the acoustical output signal to the user. The first tubular member has an acoustical cavity acoustically coupled to the speaker in the housing. In this way, the acoustical cavity of the first tubular member and the second and third tubular members form a sound chamber both in front of and behind the speaker providing balanced acoustical response.
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Dieken Alan P.
Kirschhoffer Jon A.
Bauer William D.
Griswold Gary L.
Isen Forester W.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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