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  1. Oxford American Dictionary

    signal-to-noise ratio

    • IPA[ˌsiɡn(ə)l tə ˈnoiz ˌrāSH(ē)ō]

    美式

    • n.
      the ratio of the strength of an electrical or other signal carrying information to that of interference, generally expressed in decibels.；a measure of how much useful information there is in a system, such as the internet, as a proportion of the entire contents.

    • noun: signal-to-noise ratio, plural noun: signal-to-noise ratios