Volume 10, Number 4 (Scientific Journal of Hamadan University of Medical Sciences-Winter 2004)                   Sci J Hamadan Univ Med Sci 2004, 10(4): 55-58 | Back to browse issues page


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Emami F. Survey Situation and Factors Affect on Hearing Protection Large Industry Workers of Hamadan City in 2001-2002. Sci J Hamadan Univ Med Sci . 2004; 10 (4) :55-58
URL: http://sjh.umsha.ac.ir/article-1-648-en.html

Abstract:   (550 Views)

Noise induced hearing loss in adults is the most cause of sensory neural hearing loss after the presbycusis and industry workers severity affect by degenerative results of that.

          Three large works of Hamadan city which had more than 200 Workers were selected in this demonstrative quest . The mean of sound pressure level evaluated with sound level meter which amount to 82-95 dB. Total exposed workers with higher noise than 85 dB evaluated by pure tone audiometery and otoscopic evaluation and the means of hearing thresholds in four
   frequency :0.5,1,2,4 kHz balanced with previously . Method of concentration data was direct observation and questionnaire .

          809 workers in local works exposed to invasive noise . 20.02% of them hadn’t any hearing protector and 79.98% had , which combinated of wax or dry cotton and fiber glass (76.20%), earplug (7.42%)and earmuff(16.38%). The means of hearing thresholds workers with protector equal to 43.36 dB and without that was equal to 44.03 dB (t=0.29, Pv<0.05). Highest
  percentage quantity in two groups related to age –bracket 40-49 years old. Women with protection(9.43%)were more than without protector(3.7%) while the most percentage related to men without protector (96.3% in contrast to 90.57%).In totally highest percentage quantity of NIHL was in workers with past-working more than 15 years (67.54% with protector , 67.28%without protector). For awareness of degenerative results the noise in
   hearing large industry workers of Hamadan city 75% insignificant and 25% had efficient awareness .

          Not using of protectors by 20.2% of worker showing light awareness to degenerative results of noise on hearing system and poor educational healthing and noting difference in means of hearing loss at protected group on basis duration of using that, strikes the process of hearing conservation program is superficial.

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Type of Study: Original | Subject: Special

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