signal-to-noise ratio

symbol: $R_{\rm{S/N}}$
initialisms: $\rm{SNR}_{\rm{dB}}$, S/N, SNR
https://doi.org/10.1351/goldbook.08282
Power of signal divided by power of noise.
Notes:
  1. When signal and noise are measured across the same impedance, SNR is often calculated as the root-mean-squared amplitude of the signal divided by the root-mean-squared amplitude of the noise.
  2. The value of signal-to-noise ratio may be expressed in decibel (\(\rm{SNR}_{\rm{dB}}\)) as ten times the logarithm to base 10 of signal-to-noise ratio.
  3. Initialisms should not be used to denote a quantity in expressions and formulae. \(R_{\rm{S/N}}\) is recommended.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 672 (https://doi.org/10.1515/pac-2019-0203)