Hearing hazard associated with industrial noise exposure.
Hamernik RP; Ahroon WA; Davis RI; Turrentine GA
Auditory Research Laboratory, Research Foundation of SUNY, State University of New York at Plattsburgh, Plattsburgh, New York, Report ARL 90-4 1990 Aug; :1-551
Studies were conducted to investigate the effects of impulse noise on hearing. The interaction of impulse and continuous noise was investigated using a well established idealized exposure paradigm. Several different impulse repetition rates were used to study the effects of repetition rate on hearing loss from the combined impulse and continuous noise exposures. A digital noise generation and analysis system was built to create and quantify very realistic industrial noise environments for laboratory experimentation. The system was used to produce noise environments for studies in chinchillas. The noises which were synthesized were continuous and had a variable quality of impulsiveness which could be quantified, the kurtosis. Such a system was very effective in simulating the most potentially hazardous types of industrial noise environments. The studies indicated that the concept embodied in the prototype digital noise generation system did indeed produce the kinds of stimuli that will allow one to explore the hazards of nonGaussian noises. NonGaussian noises were shown to typically produce a higher level of trauma than pure Gaussian noises of the same spectrum and energy. The findings supported the hypothesis that a high kurtosis noise is more hazardous to hearing than a low kurtosis noise of the same energy and spectrum, and that this effect is frequency specific.
NIOSH-Grant; Noise-induced-hearing-loss; Industrial-noise; Laboratory-animals; Noise-frequencies; Impulse-noise
Communicative Disorders & Scis Research Foundation of Suny P O Box 9 Albany, N Y 12201
Final Grant Report
Auditory Research Laboratory, Research Foundation of SUNY, State University of New York at Plattsburgh, Plattsburgh, New York, Report ARL 90-4
State University of New York at Albany