A telephone that is equipped with a volume control either built into the handset, the base of the phone or via an attachment.

An electronic device for increasing the strength or gain of an electrical signal.

An increase in the intensity (loudness) of sounds provided by a hearing aid or assistive listening device.

Public law 101-336 passed in 1990 that prohibits discrimination on the basis of disability in employment, transportation, public accommodation, state and local government and telecommunications. This is a “civil rights act” for persons with disabilities.

The main visual/gestural (signed) language of culturally deaf people in the United States and Canada. ASL has its own word order and set of grammatical and syntactical rules.

Same as Background Noise.