Although noise may be innocuous in many vocational environments, there is a growing concern in industry that it can reach hazardous levels when amplified by hearing aids.
This study examined the daily noise exposures associated with hearing aid use in industry.
This was done by both laboratory and site measurements in which hearing aids were coupled to the microphone of an integrating sound level meter or dosimeter.
The former method involved the use of recorded railroad and manufacturing noise and a Bruel and Kjaer 4128 Head and Torso simulator.
In the latter procedure, a worker wore one of three hearing aids coupled to a dosimeter during 8-hour shifts in a manufacturing plant.
Both methods demonstrated that even when amplified by mild-gain hearing aids, noise exposures rose from time-weighted averages near 80 dBA to well above the OSHA maximum of 90 dBA.
The OSHA maximum was also exceeded when moderate and high gain instruments were worn in non-occupational listening environments.
The results suggest that current OSHA regulations that limit noise exposure in sound field are inappropriate for hearing aid users.
Mots-clés Pascal : Prothèse, Audition, Appareillage, Industrie, Exposition professionnelle, Bruit, Amplification, Bruit ambiant, Risque, Norme, Surdité, Homme, Médecine travail, Oreille pathologie, ORL pathologie
Mots-clés Pascal anglais : Prosthesis, Hearing, Instrumentation, Industry, Occupational exposure, Noise, Amplification, Ambient noise, Risk, Standards, Hearing loss, Human, Occupational medicine, Ear disease, ENT disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0228719
Code Inist : 002B30B01B. Création : 199608.