signal-to-noise ratio
/ˈsɪgnəltənɔɪz/noun
1- the ratio of the strength of an electrical or other signal carrying information to that of unwanted interference, generally expressed in decibels信噪比。
1.1
- informal a measure of how much useful information there is in a system, such as the Internet, as a proportion of the entire contents〈非正式〉（总量中的）有用信息比。