The ratio in decibels between an audio signal voltage and noise voltage. A device with a low signal-to-noise ratio is considered noisy, and a device with a high signal-to-noise ratio is considered clean or quiet, with little background noise accompanying the signal.
SIGNAL-TO-NOISE RATIO
Meaning of SIGNAL-TO-NOISE RATIO in English
Guitar English glossary. Английский словарь гитарных терминов . 2012