TEMPORAL CHARACTERISTICS OF THE ACOUSTIC REFLEXES OF THE INTRA-AURAL MUSCLES IN "NOISE" WORKERS WITH NORMAL HEARING AS WELL AS WITH INITIAL AND PRONOUNCED HEARING IMPAIRMENT

K.Raupova, M.T. Nasretdinova,  N.A.Normuradov, J.H.Rakhimov

Authors

K.Raupova, M.T. Nasretdinova, N.A.Normuradov, J.H.Rakhimov Samarkand State Medical University

Keywords:

Noise, pure-tone audiometry, auditory reflexes.

Abstract

The author presents the data on the rise and fall times of intraaural muscular acoustic reflex in the noise-exposed workers depending on their functional state. In workers with practically normal hearing there was a difference in duration of these periods (fall and rise) in presence of a 10-dB tonal perception difference in 4000 to 8000 Hz range. Considerable lengthening of both periods was revealed in the workers with a marked impairment of the hearing function. This may be explained by fatigue processes development in the neuromuscular system of the hearing organ.

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