Impulse noise trauma: a study of histological susceptibility.
Hamernik RP; Henderson D
Arch Otolaryngol 1974 Feb; 99(2):118-121
The integrity of the organ of Corti after exposure to high intensity impulse noise was studied using the chinchilla and guinea-pig. Animals were exposed to three levels of impulses. Evoked-response audiometry and the surface preparation techniques were used to obtain both audiometric and histologic data from one half hour to 50 days after exposure. The data indicate that lower (155-decibel peak sound pressure level) intensities are potentially more hazardous to the hair cell population than the higher intensities and that there exists a critical intensity and duration above which individual susceptibility precludes any confident histological comparison across animals. Failure of the conductive mechanism is presumed to be responsible for this large histological variability.
NIOSH-Publication; NIOSH-Grant; Histopathology; Sound-levels; Hearing-disorders; Ear-disorders; Temporary-threshold-shifts; Audiometric-testing
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Archives of Otolaryngology
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