Methods for assessing safe seniority in high noise conditions

Abstract

A method for estimating the maximum allowable length of service in high noise conditions based on the calculation of the allowable working dose when working in working conditions with exceeding hygienic standards, which is based on the “equal energy” rule applicable to any factor of the each working environment is presented. A method of calculating the dose of the permissible noise level during the entire seniority LCT is proposed, on the assumption of threshold permissible values of the sound level (equivalent sound level), which allows implementing an occupational safety management strategy, both through organizational measures (transfer to areas with acceptable noise levels) and the development of measures to improve working conditions and safety. The dose principle of hygienic rationing allows us to estimate the actual load on the employee’s sensory systems and the required number of days of rest or work with reduced noise levels. To solve this problem, in the presented methodology, analytical methods that are proposed, allows to count the number of days of rest (or work with a reduced dose of noise) during a shift, month or year depending on the value of the equivalent noise level LA and the duration of its impact.

Functional State of Workers Data Analysis in the Labor Process

“…As can be seen from the table, the concentration of welding aerosol in front of and under the welder shield was, on average, 16.2 and 12.4 mg / m3, the concentration of manganese in both measurement points exceeded the MPC (maximum permissible concentration) by 4-6 times. Microclimate parameters and illumination levels corresponded to acceptable values [3,4]. The concentration of nitrogen oxides and carbon monoxide did not exceed the MPC [5].…”

“…The concentration of nitrogen oxides and carbon monoxide did not exceed the MPC [5]. Energy radiation in the optical range exceeded the MPL (maximum permissible level): 120 times in the ultraviolet part of the spectrum, 1.5 times in the infrared part [3,6].…”