Technical Bulletins on Assistive Listening Systems (ALSs)

Assistive listening systems are devices which enhance the sound quality and volume of public address systems for persons who are hard of hearing, including those who use hearing aids. The ADA Accessibility Guidelines require assistive listening systems in certain assembly areas, such as theaters, concert and lecture halls, and arenas. Under a project with the Lexington Center, the Board has developed a series of technical bulletins that explain the different types of systems available and provide guidance on their use and installation for consumers, installers, and providers.