Sound pickup sensor

Details Sound pickup sensor Sound pickup sensor

2006-07-25

2006-07-25

Pendleton, Brian T. (Department: 2644)

Electrical audio signal processing systems and devices

Stethoscopes, electrical

C181S131000

Reexamination Certificate

active

07082202

ABSTRACT:
A sensor (10) preferably for use in an electronic stethoscope (15) comprises a substantially cylindrically shaped viscoelastic contact and transfer body (2) engaging tightly a hard back piece (1) and being tightly surrounded by a piezoelectric member, e.g. one or two piezoelectric foils (4, 7) that convert sound pressure to electrical signals.

REFERENCES:
patent: 3573394 (1971-04-01), Birnbaum
patent: 4672976 (1987-06-01), Kroll
patent: 4947859 (1990-08-01), Brewer et al.
patent: 4987859 (1991-01-01), Vanderzanden
patent: 5913829 (1999-06-01), Reeves et al.
patent: 6152879 (2000-11-01), Mohler
patent: 6295365 (2001-09-01), Ota

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