The application of frequency and time domain kurtosis to the assessment of hazardous noise exposures.
Lei-F; Ahroon-WA; Hamernik-RP
J Acoust Soc Am 1994 Sep; 96(3):1435-1444
A study was conducted on the use of sound frequency and time domain data in predicting the effects of noise exposure on auditory function. Audiograms were obtained from 44 monaural chinchillas at 0.5, 11.2 and 16 kilohertz (kHz) octave intervals. The animals were subjected to one of five different 5 day noise exposure regimens, differing only in temporal structure. Thresholds were measured daily at 0.5, 2.0 and 8.0kHz. Threshold shift (TS) was measured at 2, 8, 24, and 240 hours postexposure. Analysis of the audiometric and histological effects on animals from each group revealed that, although each noise exposure regime varied only in temporal structure and not in exposure energy or spectra, different magnitudes and frequency distributions of hearing and sensory cell loss were produced. The authors conclude that noise time and frequency domains are important determinants in hearing loss, and that these statistical metrics are good predictors of the magnitude and frequency distribution of acoustic trauma.
NIOSH-Publication; NIOSH-Grant; Noise-induced-hearing-loss; Noise-exposure; Auditory-system; Noise-frequencies; Noise-levels; Audiometry; Laboratory-animals
Communicative Disorders & Scis Research Foundation of Suny P O Box 9 Albany, N Y 12201
Journal of the Acoustical Society of America
State University of New York at Buffalo, Buffalo, New York