SIGNAL-TO-NOISE RATIO (SN) By N., Pam M.S. - April 13, 2013 a ratio of the power of a signal to the power of noise that is expressed in decibels. If the signal is speech it is called speech to noise ratio. SIGNAL-TO-NOISE RATIO (SN): "The signal to noise ratio is expressed as decibels." Related Psychology Terms SOUND-LEVEL METER PLOSIVE SPECTRUM LEVEL NOISE BIRTH RATIO VELAR T MORBIDITY RATE ARTICULATION INDEX VOICE-ONSET TIME (VOT) FORCED-CHOICE TEST Cite this page: N., Pam M.S., "SIGNAL-TO-NOISE RATIO (SN)," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/signal-to-noise-ratio-sn/ (accessed September 27, 2020).