Image: Шкаринов+Денисов
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Description: Eight study participants used various personal protective equipment against noise. The graph shows the maximum, minimum, average values of noise attenuation (lines); as well as average values plus/minus standard deviations (markers). This image was created on the basis of information from a published scientific study: Shkarinov L., Denisov E. The efficiency of several types of personal noise protectors and their selection as a function of the conditions of use. Labour Hygiene and Occupational Diseases. 1966, No. 6, pp. 38-43. The model of the earmuffs: VTsNIIOT-1.
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