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A Comparison Of Three Methods For Measuring The Attenuation Provided By Insert-Type Hearing-Protective Devices, Lois Jeanne Gaier
A Comparison Of Three Methods For Measuring The Attenuation Provided By Insert-Type Hearing-Protective Devices, Lois Jeanne Gaier
Dissertations and Theses
To effectively implement an occupational hearing conservation program, employers must know the amount of attenuation (noise reduction) provided by the hearing protective devices used by their employees. Currently standardized test methods, performed under laboratory conditions, cannot be easily implemented in industrial settings, and previously proposed field methods have depended upon the use of special headphones which are not typically available in the workplace. These problems have led many occupational hearing conservationists to use standard audiometric headphones to evaluate the attenuation provided to employees using insert-type hearing-protective devices. There has, however, been little research into the validity of using standard audiometric …
Survey Of Oregon's Public School Hearing Conservation Programs, Jill M. Jordan-Trestik
Survey Of Oregon's Public School Hearing Conservation Programs, Jill M. Jordan-Trestik
Dissertations and Theses
A survey instrument was designed to yield information regarding hearing conservation activities. This instrument was then distributed to those individuals identified as the coordinators for the various district programs.
An Investigation Of Temporary Threshold Shift Among Helmeted Motorcycle Riders, Alamander Hicks
An Investigation Of Temporary Threshold Shift Among Helmeted Motorcycle Riders, Alamander Hicks
Dissertations and Theses
The purpose of the present study involved the investigation of the significance of wind noise as a contributing factor toward temporary threshold shifts among a select sample of motorcycle riders. Five ' normal-hearing, helmeted, female subjects were administered pure-tone air-conduction hearing tests immediately before and within 2 minutes after exposure to three noise-related aspects of motorcycle riding. The amount of ,hearing loss present at 3k, 4k and 6k Hz after each 20 minute exposure condition was recorded as the TTS for that subject. The three conditions consisted of motorcycle noise only, wind noise only and motorcycle and wind noise combined. …