People with all types and degrees of hearing loss can benefit from an assistive listening device (ALD). Since the microphone of a typical hearing aid is worn on or behind your ear, its ability to enhance the talker-to-background-noise ratio is limited. However, ALDs are designed to increase the loudness of a desired voice, such as a radio, television, or a public speaker, without increasing the background noise. This is because the microphone of the assistive listening device is placed close to the talker or device of interest, while the microphone of the hearing aid is always close to the listener.
ALDs include alarm clocks, TV listening systems, telephone amplifying devices, and auditorium-type assistive listening systems. Many newer devices are small, wireless, and compatible with a person’s digital hearing aids. Alarms and other home ALDs may be small devices that are placed discreetly on tables, next to the TV, or on the wall.