Dynamic range
In audio engineering, dynamic range is the range of values, measured in decibels[1], between the quietest part of an audio signal (including the noise floor) and the loudest part of the audio signal (before clipping occurs).[2][3]
References:
[1]: katz-2014 p.377
[2]: wyner-2013 p.41
[3]: Hahn, Michael. “Dynamic Range: What It Is and Why It Matters in Mastering.” LANDR Blog, 2021-04-12, https://blog.landr.com/dynamic-range-mastering/.