Two-way stethoscope for direct and amplified sound

Details Two-way stethoscope for direct and amplified sound Two-way stethoscope for direct and amplified sound

1976-09-27

1978-02-07

Cooper, William C.

Surgery

Truss

Pad

128 205S, A61B 704

Patent

active

040728226

ABSTRACT:
The present invention relates to a stethoscope, more particularly to a two-way stethoscope which permits hearing both direct and amplified sound from the human body through manipulation of a simple switching means at hand. The microphone for the electronic mode is located in the chestpiece, while the earpieces contain the speakers.

REFERENCES:
patent: 3160708 (1964-12-01), Andries
patent: 3247324 (1966-04-01), Cefaly

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