Definition of signal noise ratio
: the ratio of radio field intensity to noise field intensity
also
: the ratio of the signal transmitted through a piece of radio equipment to the noise generated within the equipment itself
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“Signal noise ratio.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/signal%20noise%20ratio. Accessed 28 May. 2022.
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The first known use of signal noise ratio was in 1923
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