[The risk of occupational neurosensory loss of hearing in the workers employed in coal and ore mining industries].

This clinico-audiological study included 983 workers engaged in coal and ore mining exposed to combined effect of occupational noise and vibration. Pathogenetic mechanisms underlying the development of occupational deafness were shown to depend on intensity and duration of the action of these factors. Impedancometry was used to evaluate the functional state of the middle ear and to study protective and adaptive potential of ear muscles. Criteria are proposed for the identification of groups of workers at risk of development of occupational deafness. The relationship between individual features of cerebral hemodynamics and the functional state of the middle ear is established.