[Dynamics of the recruitment phenomenon in chemical industry workers]

The state of auditory function, the changes in the over-threshold tests for recruitment phenomenon respectively, characteristic for the affection of the sound-receiving links of the auditory analyzer, have dynamically been observed (at interval of 3 to 6 months) among 100 workers from chemical industry. In addition of the otorhinolaryngological examination and acoumetric study of hearing acuity, some tonal threshold and over-threshold audiometric examinations have been performed. A definite correlation has been established between the changes in the hearing function and the length of service of the workers. The data about the over-threshold studies reveal that the tests for recruitment phenomenon become more often positive in the workers, being organic solvents, paints and varnishes. The auditory disorders were observed in the region of high frequencies, being with sound-receiving character. The test of Carhardt became positive rather early, interpreted as early disorder of the processes of adaptation. The approaches of the early diagnostics of hearing disorders are presented as a result from the study.