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    What is signal to noise ratio in the night vision goggles?

    • Author:Durham technology
    • Release on :2019-01-03
    You might have come across a listed product specification, or maybe even heard or read a discussion about signal-to-noise ratio. Often abbreviated as SNR or S/N, this specification can seem cryptic to the  consumer. While the math behind signal-to-noise ratio is technical, the concept is not, and this value can impact a system's overall sound quality.



    Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. SNR is defined as the ratio of signal power to the noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise.Generally expressed in decibels(dB).


    When a measurement is digitized, the number of bits used to represent the measurement determines the maximum possible signal-to-noise ratio. This is because the minimum possible noise level is the error caused by the quantization of the signal, sometimes called Quantization noise. This noise level is non-linear and signal-dependent; different calculations exist for different signal models. Quantization noise is modeled as an analog error signal summed with the signal before quantization ("additive noise").



    Additionally, internal noise of electronic systems can be reduced by low-noise amplifiers.The higher the signal-to-noise ratio, the better in night vision goggles.