Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Hazard from weapons impulses: histological and electrophysiological evidence.

Authors
Price-GR; Kim-HN; Lim-DJ; Dunn-D
Source
J Acoust Soc Am 1989 Mar; 85(3):1245-1254
NIOSHTIC No.
00187096
Abstract
Histological data was presented from studies with 51 adult cats exposed to either rifle or howitzer impulses on one occasion at peak pressures (145 to 155 decibels (dB) or 153 to 166dB, respectively). The electrophysiological effects were related to the histological measures, and the theoretical and practical implications are discussed. Histological measurements were carried out 2 months after the exposures occurred. For both types of impulse the losses tended to be in the middle of the cochlea in focused lesions, even though the spectral peaks of the acoustic stimuli had been at about 80 hertz (Hz) for the howitzer and 1000Hz for the rifle. More susceptibility was noted among the outer hair cells than the inner hair cells and interindividual differences in effects were large. The two impulse sources were equally hazardous when the peak pressure of the rifle impulse was lower than the peak pressure of the howitzer impulse by about 9dB. In terms of dB-A weighted energy, the exposures were equally hazardous when the rifle exposure contained about 35 times less energy than the howitzer exposure. The histological data were consistent with the electrophysiological data, which indicated that present standards for impulse noise exposure may overrate the hazard of low frequency impulses relative to impulses in the midrange.
Keywords
NIOSH-Author; Military-personnel; Noise-exposure; Ear-disorders; Impulse-noise; Explosions; Cell-damage; Physiological-response; Acoustical-measurements
CODEN
JASMAN
Publication Date
19890301
Document Type
Journal Article
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
0001-4966
NIOSH Division
DBBS
Source Name
Journal of the Acoustical Society of America
State
OH; MD
TOP