[Hygienic evaluation of physical characteristics of the effect of impulse noise on stampers and blacksmiths and hearing loss and its prevention].

The investigation of sanitary working conditions of stampers and blacksmiths revealed that intense impulse noise of complex time and stochatic structure was a major health adverse factor. Noise levels exceeding 110 dB played an important role in the formation of general noise load, thus acoustic sensitivity being modified. Close correlation was established between exposition and the recovery space of time auditory threshold deviation characterizing analyzer's stress. High effectiveness of new individual means of noise protection was demonstrated along with the necessity of developing requirements for noise characteristics of impulse noise-generating machines.