METHOD OF ESTIMATING ACOUSTIC EFFICIENCY OF PERSONAL NOISE PROTECTION MEANS

摘要

FIELD: physics.SUBSTANCE: method involves measuring the sound pressure level for each normalised octave frequency with defined maximum values of the sound pressure level for each normalised octave frequency, followed by calculation of acoustic efficiency. Measurement and determination of maximum sound pressure levels is carried out engineer workstations for which the personal protection means is designed, and acoustic efficiency is calculated based on the difference between the required and provided values of air conductivity for soundproof earphones and bone conductivity for soundproof headpieces. The obtained values are used to estimate acoustic efficiency. A higher safety factor corresponds to higher acoustic efficiency of the personal noise protection means.EFFECT: method enables to estimate acoustic efficiency of personal noise protection means on the whole frequency range given by sanitary standards.3 tbl, 1 ex