Abstract:
Background: Noise is a major health threat in occupations where the level exceeds the permissible limit (85
decibel). Noise causes discomfort or adverse health effect. The degree of negative effects of noise depends on its
intensity, spectrum of frequency nature, duration of exposure and individual sensibility. Materials and
Methods: This cross-sectional study was performed on Alhodhood and Alsabagoon textile factories
employees who were exposed to noise in Khartoum - Sudan. Noise levels (dBA) were measured by sound
level meter. Data was collected using questionnaire; and Pure tone air conduction audiometric test was
conducted by calibrated Kamplex Diagnostic audiometer (KLD 23 mha, BSEN 60645) to determine the
employees’ hearing thresholds. Data was analyzed to determine the overall prevalence of hearing
loss. Results: The highest recorded sound pressure level SPL reading at Alhodhood factory was 88.9±2.7
dB and Leq 88.0±6.5 measured at the weaving section. Max p ranged from 83.61±6.5 to 104±2.1. The
highest recorded sound pressure level reading at Alsbagoon factory was 93.8±1.7 dB and Leq 93.2±1.1,
measured at the preparing section flowed by weaving record 87.0±3.0 which were more than permissible
level. Max p ranged from 92.34 to 108.2±1.4. Workers at Alhodhood and Alsbagoon perceived the level of
noise at their work environment is high, prevalence of noise-induced hearing loss (right ear), the highest
31.5% was among Alsbagoon workers and 14.3% among Alhodhood and noise-induced hearing loss (left
ear) was 24.1% among Alsbagoon workers and 17.1% among Alhodhood. Conclusions: Workers in
weaving section of both factories and preparing section in Alsbagoon factory were exposed to average
levels of noise above 85 dBA, the major risk factors for NIHL were the duration and the level of noise
exposure and hearing loss was significantly associated with working experience of more than 10 years.
Keywords: Noise, noise induced hearing loss, exposure, and textile.
Abstract:Background: Noise is a major health threat in occupations where the level exceeds the permissible limit (85decibel). Noise causes discomfort or adverse health effect. The degree of negative effects of noise depends on itsintensity, spectrum of frequency nature, duration of exposure and individual sensibility. Materials andMethods: This cross-sectional study was performed on Alhodhood and Alsabagoon textile factoriesemployees who were exposed to noise in Khartoum - Sudan. Noise levels (dBA) were measured by soundlevel meter. Data was collected using questionnaire; and Pure tone air conduction audiometric test wasconducted by calibrated Kamplex Diagnostic audiometer (KLD 23 mha, BSEN 60645) to determine theemployees’ hearing thresholds. Data was analyzed to determine the overall prevalence of hearingloss. Results: The highest recorded sound pressure level SPL reading at Alhodhood factory was 88.9±2.7dB and Leq 88.0±6.5 measured at the weaving section. Max p ranged from 83.61±6.5 to 104±2.1. Thehighest recorded sound pressure level reading at Alsbagoon factory was 93.8±1.7 dB and Leq 93.2±1.1,measured at the preparing section flowed by weaving record 87.0±3.0 which were more than permissiblelevel. Max p ranged from 92.34 to 108.2±1.4. Workers at Alhodhood and Alsbagoon perceived the level ofnoise at their work environment is high, prevalence of noise-induced hearing loss (right ear), the highest31.5% was among Alsbagoon workers and 14.3% among Alhodhood and noise-induced hearing loss (leftear) was 24.1% among Alsbagoon workers and 17.1% among Alhodhood. Conclusions: Workers inweaving section of both factories and preparing section in Alsbagoon factory were exposed to averagelevels of noise above 85 dBA, the major risk factors for NIHL were the duration and the level of noiseexposure and hearing loss was significantly associated with working experience of more than 10 years.Keywords: Noise, noise induced hearing loss, exposure, and textile.
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