SU-30 aircraft is a modem fighting aircraft in Vietnam. The noise of the aircraft's engine with high frequency and intensity will have effect on the hearing of the soldiers, specially aircraft maintenance soldiers. This study was carried out to investigate the noise levels in some working areas and the effect of noise on the hearing of the Su-30 aircraft maintenance soldiers. The results showed that the sound intensity levels in working areas. of Su-30 aircraft maintenance soldiers in the airport as well as maintenance area were higher than hygienic standards. The highest sound intensity level was 120 dB. The rate of hearing loss among SU-30 aircraft maintenance soldiers was quite high (23.9 percent). The higher seniority, the higher rate of hearing loss and their higher level of hearing loss in SU-30 aircraft maintenance soldiers.
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