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- The difference between the nominal or maximum operating level and the noise floor in dB.
- The range or distance between the noise floor (the noise level of the equipment itself) and the music signal. Source: http://www.owenscorning.com/around/sound/glossary.asp
- The ratio between the nominal level of a signal (0 dBm) and the general circuit noise level (noise floor) measured in dB. All electronic devices produce noise. The S/N ratio is a measure of how quiet the device is by indicating how low the level is of the inherent noise. Source: Church Audio & Acoustics Glossary
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