Noise canceling improvement to stethoscope
First Claim
1. A stethoscope for reducing background noise comprising:
- a housing having a receiver portion and an audio output means;
the receiver portion having a plurality of noise ports;
a microphone isolator located within the receiver portion;
a noise canceling microphone having a front end and a back end enclosed by the microphone isolator;
an acoustical tube having an acoustical waveguide connected to the microphone isolator for channeling an input signal;
a chest piece having a sound diaphragm pickup for receiving the input sound and noise signal connected to said acoustical tube to permit a pressure gradient noise porting by said noise ports placed at the back end of the microphone which is internally located before the noise ports.
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Accused Products
Abstract
A stethoscope for reducing background noise comprising a housing having a receiver portion and an audio output means; the receiver portion having a plurality of noise ports; a microphone isolator located within the receiver portion; a noise canceling microphone having a front end and a back end enclosed by the microphone isolator; an acoustical tube having an acoustical waveguide connected to the microphone isolator for channeling an input signal; a chest piece having a sound diaphragm pickup for receiving the input sound and noise signal connected to acoustic tube to permit a pressure gradient noise porting placed at the back end of the microphone and internally behind the noise port.
46 Citations
2 Claims
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1. A stethoscope for reducing background noise comprising:
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a housing having a receiver portion and an audio output means; the receiver portion having a plurality of noise ports; a microphone isolator located within the receiver portion; a noise canceling microphone having a front end and a back end enclosed by the microphone isolator; an acoustical tube having an acoustical waveguide connected to the microphone isolator for channeling an input signal; a chest piece having a sound diaphragm pickup for receiving the input sound and noise signal connected to said acoustical tube to permit a pressure gradient noise porting by said noise ports placed at the back end of the microphone which is internally located before the noise ports. - View Dependent Claims (2)
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Specification