[The long-term effects of noise on dentists].

On the basis of analyses of the main noise emitting equipment was carried out an audiometric test of dentists. The high frequencies of various equipment are reflected in a reduced high-frequency hearing. Significant differences became evident with increasing years of service, as well as in comparison to age adequate control groups. The high-frequency audiogram used in addition to the normal threshold audiogram is suitable to prove such occupational changes. The measured hearing loss remained without social importance in all cases.