The dictionary defines white noise as a steady, unvarying, unobtrusive sound, as
an electronically produced drone or the sound of rain, used to mask or obliterate
Essentially, white noise is a combination of all of the different frequencies of
sound. Because white noise contains all frequencies, it drowns out all other sounds
your ears might pick up. As a result of this, it can be used effectively to increase
the restfullness of sleep and is excellent in calming down fussy newborns.
White noise is even recognized as a sound masking treatment for attention deficit
disorder (ADD/ADHD) and for those suffering from tinnitus (ringing in the ears),
hyperacusis and other inner ear disorders.