What Are Assistive Listening Devices or ALDs?
Internet URL
http://www.asha.org/public/hearing/treatment/assist_tech.htm 
Sponsoring Agency
American Speech-Language-Hearing Association
Description
This article explains what assistive listening devices are and how these devices can be used with or without a hearing aid to improve the daily communication situations -- negative effects of distance, background noise, and poor room acoustics -- faced by the hard-of-hearing.