The signal-to-noise ratio (SNR) is a measure used to compare the level of a desired signal to the level of background noise. A higher SNR indicates that the signal is clearer and more distinguishable from the noise, which can improve the quality of communication or data transmission. SNR is commonly expressed in decibels (dB). In various fields, such as telecommunications and audio engineering, a good SNR is crucial for effective performance. For example, in audio recordings, a high SNR ensures that the music or voice is heard clearly without interference from unwanted sounds. Similarly, in data transmission, a strong SNR helps maintain the integrity of the information being sent.