Assistive Listening Systems Bulletin 9C : For Providers

By United States Access Board

Book Id: WPLBN0000703187
Format Type: PDF eBook:
File Size: 0.3 MB
Reproduction Date: 2005

Title:	Assistive Listening Systems Bulletin 9C : For Providers
Author:	United States Access Board
Volume:
Language:	English
Subject:	Government publications, Access Board, Architectural and Transportation Barriers Compliance Board
Collections:	Government Library Collection, U.S. Access Board Collection
Historic Publication Date:
Publisher:	United States Access Board


Citation APA MLA Chicago States Access Board, B. U. (n.d.). Assistive Listening Systems Bulletin 9C : For Providers. Retrieved from http://gutenberg.cc/

Description
Government Reference Publication

Excerpt
Excerpt: What are assistive listening systems (ALSs)? Assistive listening systems (ALSs) are devices designed to help people with hearing loss improve their auditory access in difficult and large-area listening situations. Typically, these devices are used in such venues as movie houses, theaters, auditoriums, convention centers, and stadiums, where they are piggybacked on a public address system. They may also be used in smaller listening locations like courtrooms, museums, classrooms, and community centers. Even though a public address (PA) system is in use, sound signals have to travel from the loudspeaker(s) to the listener?s seating position. Depending upon the particular site, this distance may be anywhere from a few feet to well over a hundred feet. Whenever sound signals travel acoustically, they lose volume over distance and are subject to distortion and masking from background noise and reverberation.