Signal-to-Noise Ratio
Natural & Formal Sciences Dictionary
Definition
The ratio of a signal's measurable power (or variance) to the power (or variance) of background noise, expressed as a linear ratio or in decibels; quantifies detectability and fidelity of a measured quantity.
Signal-to-Noise Ratio
Engineering & Applied Technologies Dictionary
Definition
Signal‑to‑Noise Ratio (SNR) is the ratio of desired signal power to background noise power measured over a specified bandwidth and at a specified reference point; commonly expressed in decibels as SNR(dB)=10·log10(Psignal/Pnoise).