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circuit noise

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circuit noise [′sər·kət ‚nȯiz]
(communications)
In telephone practice, the noise which is brought to the receiver electrically from a telephone system, excluding noise picked up acoustically by telephone transmitters.


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With old-style analog hearing aids, soft sound amplification is difficult to achieve due to problems with stability, feedback, and circuit noise within the hearing aid.
Field effect technology essentially eliminates false positives induced by low-level circuit noise.
The test set stores and dials up to 10 individual numbers for active line testing, and can be ordered in either C-message weighting, or psophometric filter versions for circuit noise measurements, depending on local requirements.
 
 
 
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