Noise

Sounds present alongside a sound of interest but typically weaker in energy and generally not of interest.

Loud, disordered, unintelligible speech noise from many sources.

A loud, confusing, disagreeable sound, such as many voices shouting simultaneously.

A random, unstructured sound in which the value at any moment provides no information about the value at any other moment. White noise has equal energy in all frequency bands.

Unstructured noise whose energy decreases with frequency such that equal amounts of energy are distributed in logarithmic bands of frequency, typically octaves. Pink noise sounds more like a rumble where white noise sounds like a hiss.

A dull, continunous sound with a strong rhythmic modulation.

The general class of sounds caused by a periodic mechanical oscillation.