The Relationship Between Noise and Noise Induced Hearing Loss in the Isfahan Forging Industries Workers
One of the most impairment aspect in occupational health is the study of noise induced hearing loss (NIHL) in noise exposed workers. The study was carried out to find out relation and a model between noise exposed workers and NIHL in 1997. To determine NIHL in the worker in loom-...
| Main Authors: | , , |
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| Format: | Article |
| Language: | fas |
| Published: |
Hamadan University of Medical Sciences
2001-06-01
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| Series: | پزشکی بالینی ابن سینا |
| Subjects: | |
| Online Access: | http://sjh.umsha.ac.ir/article-1-890-en.html |
| Summary: | One of the most impairment aspect in occupational health is the study
of noise induced hearing loss (NIHL) in noise exposed workers. The study
was carried out to find out relation and a model between noise exposed
workers and NIHL in 1997.
To determine NIHL in the worker in loom-650, 45 workers having no
confounding factors were choosen. All the study population were examined
using audiometer.
Result showed the SPL range was 70-105 dBA. The average of work
experience were 10.3±3.5 and age 37.4±6.7 years. Correlation coefficient
between job history and NIHL in the left ear was 0.7099 and in the right ear
was 0.7127. The Pearson’s correlation coefficient between left and right ear
was positive and equal to 0.69. The mean of NIHL between right and left
ear was 14 dB which the regression model predicts the limit of hearing loss
in left ear is 4.5 years and in right ear is 3.8 years. Although the results
showed loss of hearing begins in right ear, but left ear had more hearing loss
with increasing of experience years. The danger limit for hearing of these
workers (based on 25 dB loss), for left ear and right ear were after 17 and
20.7 years of work experience respectively.
To prevent serious impairment in the workers hearing, it is suggested to
consider the limit of 17 yearchr('39')s occupancy in forging as a base for changing
the occupancy. |
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| ISSN: | 2588-722X 2588-7238 |