title: Development of a low cost assistive listening system for hearing-impaired student classroom.
abstract: This paper describes the design, development, and tests of a low cost ALS. It was designed for hearing-impaired student classrooms. It utilised digital wireless technology and was aimed to be an alternative to a popular FM ALS. Key specifications include transmitting in 2.4 GHz ISM band with eight selectable transmission channels, battery operated and chargeable, pocket size, and ranged up to thirty metres. Audio characteristics and user tests show that it is comparable to a commercial system, currently employed in our partner school. The results also show that wearing an ALS clearly improves hearing of hearing-impaired students. Long-term usage by school children will be monitored to evaluate the system robustness and durability.
authors.affiliation: Department of Computer Engineering, Faculty of Engineering, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand. setha.p@chula.ac.th
authors.forename: Setha
authors.initials: S
authors.lastname: Pan-ngum
authors.forename: Tharapong
authors.initials: T
authors.lastname: Soonrach
authors.forename: Sangvorn
authors.initials: S
authors.lastname: Seesutas
authors.forename: Anukool
authors.initials: A
authors.lastname: Noymai
authors.forename: Pasin
authors.initials: P
authors.lastname: Israsena
mesh_terms: D000669:Amplifiers, Electronic; D012048:Correction of Hearing Impairment / Q000191:economics / Q000295:instrumentation* / Q000379:methods*; D003362:Cost-Benefit Analysis; D060345:Education of Persons with Hearing Disabilities / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006310:Hearing Aids; D019986:Persons with Hearing Disabilities / Q000534:rehabilitation*; D013785:Thailand; D059015:Wireless Technology / Q000295:instrumentation*