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Comparative Hygienic Noise and Vibration Evaluation of Power Excavating Shovels in the Sibaiskii and Lebedinskii Pits,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
On shovels of one and the same brands, vibration and noise were more strongly expressed at the Sibayskiy pit than at the Lebedinskiy pit this was connected with the different properties of the rocks being extracted and the diverse degree of the state of wear of the mechanisms of the shovels. The changes in physiological functions of the operators toward the end of the work day the increase in arterial pressure, the increase in the latent time of auditory motor and visual motor reaction, the increase in the thresholds of pain sensitivity, etc. attest to the unfavorable effect of the noise and vibration. The shifts in the physiological functions during the course of work, as well as the vibrations in health detected during the medical examination of workers were more pronounced in the operators of the Sibayskiy pit than in the operators of the Lebedinskiy pit, and depended, apparently, on the working conditions and, primarily, on the noise levels and the vibrational parameters, affecting the workers.
APPROVED FOR PUBLIC RELEASE