NOISE: EFFECTS AND CONTROL
DEFENCE RESEARCH MEDICAL LABS TORONTO (ONTARIO)
Pagination or Media Count:
The type and degree of the effects on man of exposure to high- intensity noise is determined primarily by 1 the type of noise, i.e., continuous or interrupted, 2 the spectrum of the noise, i.e., low or high pitch, 3 intensity loudness, 4 length of exposures, 5 the acoustic environment, 6 previous noise exposures, and 7 the state of the individuals hearing mechanism. The main effects of exposure to high-intensity noise are 1 deafness, temporary and permanent, 2 interference with voice communication, and 3 changes in the efficiency with which man can do skilled and unskilled tasks. These effects may be accompanied by the arousal of feelings of fear, apprehension, annoyance, or dissatisfaction. The effects produced by exposure to noise can be eliminated or reduced significantly by the use of 1 adequate hearing conservation procedures, 2 proper voice communication phraseologies, procedures and equipment, and 3 effective noise attenuation and abatement procedures and equipment. With the knowledge, procedures and equipment available today, there is no need for most individuals exposed to high-intensity noise 85 to 150 dB to suffer permanent deafness. Similarly the use of proper communication equipment will permit adequate voice communication in areas where the level of noise may be as high as 130 dB. The use of adequate noise abatement procedures and equipment will reduce the antagonistic responses to noise arising from the irritation and annoyance aroused in many instances by exposure to high-intensity noise.
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