Risk assessment of workers exposed to noise pollution in a textile plant|
Roozbahani, M. Mohammadi; Nassiri, P. & Shalkouhi, P. Jafari
In order to assess the risks associated with worker’s hearing loss, due to exposure to noise pollution,
at the Boroujerd Textile Factory a cross sectional study was conducted. 60 workers from the Spinning and Weaving
workshops and official staff were randomly selected as case and control groups and their hearing were tested by
audiometry. The audiometric results revealed that amongst workers being exposed to the noise pollution in the
Spinning and Weaving Workshops there is a distinct increase in the number of cases of hearing loss at high frequencies.
There also appears to be a slight bias towards hearing loss in the left ear, in preference to the right in addition, those
who have worked for longer than 16 years are subjected to hearing loss even at low frequencies conversely, the office
workers (the control group) seem to suffer little or no hearing loss at low frequencies at all, but after approximately 10
years of service there may be some hearing loss, but only at higher frequencies, which could be attributed to presbycusis.
Also, the t-test (statistical hypothesis test) results verified the significant difference among both groups at high
frequencies. The questionnaire results indicated that workers feel symptoms such as headache, no sense centralization,
excitement, nervousness, vertigo. Hence, controlling procedures seem to be essential to protect workers from noise
Audiometry; Hearing loss; Occupational noise; Risk assessment; Spinning and weaving