The greater the ratio (the larger number), the less noise and more easily it can be filtered out. The lowest number is an SNR of 0, which means that noise and signal levels are the same.

To be intelligible, any data that's transmitted by any means, electronic or otherwise, must rise above any accompanying noise. The measure of that intelligibility is called its signal-to-noise ratio.

Signal-to-Noise Ratio Harvest Exchange Updated Sun, Jan 22, 2017, 7:53 PM ...