Stethoscope with high frequency filter

Details Stethoscope with high frequency filter Stethoscope with high frequency filter

1985-11-06

1987-01-06

Fuller, Benjamin R.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181135, A61B 702

Patent

active

046339710

ABSTRACT:
A low-pass filter is incorporated into the binaural tube of a stethoscope to selectively attenuate high frequency noise. The filter includes a small diameter inertance tube communicating with a large volume compliance chamber and is preferably located as far as possible from the chestpiece of the stethoscope to filter noise not only transmitted from the chestpiece, but also transmitted directly to the binaural tube.

REFERENCES:
patent: 2389868 (1945-11-01), Olson
patent: 3169600 (1965-02-01), Thomas
patent: 4270627 (1981-06-01), Hill
"Report 1192", by Don D. Davis, Jr., George M. Stokes, Dewey Moore, & George L. Stevens, Jr.
"Elements of Acoustics", by J. Blitz, 1964.

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