In audio and acoustic terminology, ambience is the reverberant quality of a room – the result of sound reflections in a confined space being added to the original sound. Ambience may also be created electronically by some digital reverb units. The main difference between ambience and reverberation is that ambience doesn't have the characteristic long delay time of reverberation: the reflections mainly give the sound a sense of space.

The ambient noise level is a measure of the average ambience of an environment over a given period of time in decibel.