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Changes in Hearing of Workers under a Prolonged Effect of Noise with Standard Parameters,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
For prolonged periods of time under industrial conditons, noise at 85-88 dB which is at the maximum permissilbe levels and 74-80 dB which is 5-10 dB below the maximum permissible levels in the frequency range of 800 to 4000 Hz, can present a danger with regard to the development of occupational hardness of hearing when the individuals hearing organ is not sufficiently stable. In order to improve the effective standards, in addition to physiological studies, it is necessary to carry out dynamic clinical observations in the process of chronic noise effect under industrial conditions.
APPROVED FOR PUBLIC RELEASE