Within the world of audio frequency testing, traditionally single sine waves or noise signals have been used.

Using a noise signal which is inherently random requires considerable averaging in order to get a clear idea of a trend.

On the other hand, independent white noise signals will not make the algorithm diverge.

Just outside of the rubber/plastic covering is a conductive metal that intercepts any noise signal.

Because the conductive metal is grounded, the noise signal runs straight to ground before ever getting to the true wire.

A noise signal is typically considered as a linear addition to a useful information signal.

It is used to characterize a noise signal in the frequency range where the human ear has its highest sensitivity.

Every station on the planet will be drowned in a pure noise signal.

An infinite-bandwidth white noise signal is a purely theoretical construction.

This model is called a Gaussian white noise signal (or process).