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Kurtosis measurements: implications for noise exposure criteria.

Authors
Hamernik-RP; Hsueh-KD; Ahroon-WA; Davis-RI; Tarrentine-GA
Source
J Acoust Soc Am 1989 Sep; 86:(Suppl 1):S72
NIOSHTIC No.
20045143
Abstract
Two conventional measures of an industrial noise environment are the overall sound-pressure level (SPL) and the power spectrum. While these two measures are necessary, they may not be sufficient to describe a noise environment for the purposes of evaluating the hazard to hearing. This presentation will describe the results of an experiment designed to test the hypothesis that for equal SPL and power spectrum a high-kurtosis noise exposure is more hazardous to hearing than is a low-kurtosis noise. Two groups of chinchillas, with two animals per group, were exposed continuously for 5 days, to one of two classes of noise at a 90 dB SPL. The power spectrum of both noises was identical but the noises had different values of kurtosis. The results clearly showed that there was up to a 20 dB greater permanent hearing loss for the animals exposed to the high-kurtosis noise. Detailed results of asymptotic and permanent threshold shifts and sensory cell losses will be presented. These results would appear to be a clear indication that, even for moderate levels of exposure, energy is not a sufficient variable upon which to base noise exposure standards. [Work supported by NIOSH.]
Keywords
Industrial-noise; Noise; Noise-exposure; Noise-frequencies; Environmental-exposure; Exposure-levels; Audiofrequency; Sound; Environmental-exposure; Environmental-hazards; Hazards; Sensory-thresholds; Animals; Laboratory-animals; Hearing-loss; Hearing-level; Hearing-acuity; Hearing; Cell-damage; Cellular-function
CODEN
JASMAN
Publication Date
19890901
Document Type
Abstract
Funding Type
Grant
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-002317
ISSN
0001-4966
Source Name
Journal of the Acoustical Society of America
State
NY
Performing Organization
State University of New York at Buffalo, Buffalo, New York
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