Question

If the signal is very low what will be the noise ratio

Answer 1

Explanation:

when an audio component lists a signal-to-noise ratio of 100 dB, it means that the level of the audio signal is 100 dB higher than the level of the noise. A signal-to-noise ratio specification of 100 dB is considerably better than one that is 70 dB

Answer 2

Higher numbers generally mean a better specification, since there is more useful information (the signal) than there is unwanted data (the noise). For example, when an audio component lists a signal-to-noise ratio of 100 dB, it means that the level of the audio signal is 100 dB higher than the level of the noise.