Transmission of sound to the inner ear by way of the ear canal and the middle ear. In hearing testing, air-conduction testing is performed by sending sounds to the ear though an earphone or loudspeaker.

The transmission of sound through the outer and middle ear to the cochlea.

The hearing threshold for a pure tone delivered from an earphone or ear inserts.

Any difference between how a person should hear and how they actually hear if some of the sound is being lost as it passes through the middle ear. In hearing testing, any difference between hearing responses for earphone or loudspeaker (air conduction) and bone vibrator (bone conduction). A gap or difference between air-conduction and bone-conduction […]

See Assistive Listening Device.

A visual (usually flashing lights) or tactile (vibrating) device that alerts a person who cannot hear to sounds such as door knocks/doorbells, telephones ringing and fire alarms.