signal-to-noise ratio(redirected from Signal to noise ratio)
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1. The ratio of the power of an electrical, electromagnetic, or optical signal to the power of background noise accompanying the signal.
2. The ease with which useful information can be discerned in the context of much noise, talk, or undesired information.
(Electronics) the ratio of one parameter, such as power of a wanted signal to the same parameter of the noise at a specified point in an electronic circuit, etc
The ratio of the amplitude of the desired signal to the amplitude of noise signals at a given point in time.