VARIANT 7. VARIANT 8

VARIANT 7

Task 1

There is the noise in hospital wards. General noise level – 40 dB. Power of this noise does not change more than 5 dB. 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 less than 400 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. Concept of "Noise". Classification of Noise

Question 2. Concept of " Vibration". Classification of vibration.

Question 3. Effect of actions of EMF on Organism. The main principles of protection from electromagnetic radiation

VARIANT 8

Task 1

There is the noise in hospital wards. General noise level – 80 dB. Power of this noise does not change more than 40 dB. It consist of 5 octave of sounds. The noise includes the sounds with frequency of oscillation less than 800 Hz. Give the hygienic estimation about this noise.

Task 2

Fiona F. works at factory durind 7 years. On his workplace there is non constant, high-frequency noise. General noise levels – 65 dB. He does not hear whispering speech durind 1 hours 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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