+**Loudness** is the perceptual attribute of [sound](/wiki/sound) that is ordered on a scale from quiet to loud. It is the subjective strength with which a listener perceives a sound, distinct from its measurable [Intensity](/wiki/intensity). Loudness depends on sound pressure level, frequency, and duration.
+## See also
+- [Amplitude](/wiki/amplitude)
+- [Decibel](/wiki/decibel)
+- [Hearing](/wiki/hearing)