Are distortion levels a problem with digital signal processing hearing aids and frequency modulation (FM) systems?

The purpose of this study was to examine objective and subjective distortion present when frequency modulation (FM) systems were coupled with four digital signal processing (DSP) hearing aids. Electroacoustic analysis and subjective listening tests by experienced audiologists revealed that distortion levels varied across hearing aids and channels.

Classroom acoustics: enhancing the listening environment through the use of amplification systems

This paper discusses the variables affecting classroom acoustics and a case study examination of some local classrooms. Classrooms were measured against proposed American National Standards Institute (ANSI) standards and treatment options for improving acoustics are suggested.

Multimedia telephone systems as a valuable communication tool for the hearing-impaired

This paper discusses videoconferencing systems as a communication tool for the hearing impaired.

A manual of FM systems for mainstream teachers

This paper presents a manual of frequency modulated (FM) sound systems designed for use by mainstream teachers who have hearing impaired students in their classrooms.