Relationship between average SNR and SNR

There is an inverse relationship between average signal-to-noise ratio and signal-to-noise ratio. Signal-to-noise ratio refers to the ratio of signal to noise, which is used to measure the relative size of effective information and noise contained in the signal. The greater the signal-to-noise ratio, the higher the strength of the signal relative to the noise, that is, the less noise is mixed in the signal. In the process of signal playback or transmission, noise has little influence on the signal, which improves the sound quality. On the contrary, when the signal-to-noise ratio is small, the proportion of noise is large, which will lead to the decline of signal quality and the sound quality of playback will also be affected.