VARIANT 15

VARIANT 15

Task 1

There is the noise at factory . General noise level – 70 dB. Thera are periodical silence between the sounds.. It consist of 1 octave of sounds which level more than another ones on 10 дБ. The noise includes the sounds with frequency of oscillation more than 1000 Hz. Give the hygienic estimation about this noise.

Task 2

Peter F. works at factory durind 7 years. On his workplace there is non constant, high-frequency noise. General noise levels – 80 dB. He does not hear whispering speech durind 1 – 3 minutes after work ( fall of hearing on 15-20 dB ). Make the diagnosis. What preventive measures is it necessary in this case?

Question 1. Kinds of sounds. Maximal Permissible Levels of Noise for Various Premises

Question 2. Actions of local and general vibration. Stages of Vibration Illness

Question 3. EMF syndrome. The main principles of protection from electromagnetic radiation

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