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Audiograms were taken on 20 young men before and immediately after exposure to Fighter-6 ground running-up noise, and their course of recovery was followed. The sound levels at the engine hatch were 117-128 dB(A). The noise-induced temporary threshold shift was more than 13 dB. The maximum threshold shift occurred at 4 kHz. The shift in the low and speech frequencies recovers more rapidly and is completed in 30 min, whereas that in the high-frequency range recovers much more slowly, not returning to normal until 24 h later. High-frequency hearing loss is at risk in groundcrew. In order to prevent hearing damage, they ought to wear ear-protectors. We discovered that the V-shaped depression was not at 4 kHz but at 6 kHz. The former view concerning the pathogenesis of "4 kHz depression", therefore, is open to question. This interesting subject warrants further study.
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
April 1978,
American Industrial Hygiene Association journal,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
June 2005,
Neuroscience letters,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
April 2004,
Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
January 1970,
The Annals of occupational hygiene,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
July 2005,
The Laryngoscope,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
January 1992,
Acta oto-laryngologica,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
June 1973,
Journal of speech and hearing research,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
August 1967,
Nihon Jibiinkoka Gakkai kaiho,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
January 1986,
Acta otorhinolaryngologica Italica : organo ufficiale della Societa italiana di otorinolaringologia e chirurgia cervico-facciale,
Y X Wu, and
X L Liu, and
B G Wang, and
X Y Wang
January 1986,
Scandinavian audiology. Supplementum,
