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Volume 24 |
July - September 2008 |
Number 4 |
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Published by : PROFESSIONAL MEDICAL PUBLICATIONS |
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ISSN 1681-715X |
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Volume 24 |
July - September 2008 |
Number 4 |
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The effect of excessive noise exposure on the
hearing thresholds of aviation workers in Karachi
Imtiaz Ather Siddiqui1, Riaz Ahmed Siddiqui2
ABSTRACT
Objectives: The purposes of this study on Aviation Workers were to (a) determine the prevalence of Noise induced hearing loss (NIHL) in aviation workers (b) suggest measures for its prevention.
Methodology: This cross sectional epidemiological study was conducted with noise exposed and non noise exposed matching variables of adult age group, full time (24 hours), male workers at a large metropolitan airport of Karachi, Pakistan (Noise exposed group), villagers living in the outskirts of Karachi who had their work place and residence within the village (non noise exposed group). The three measures used were Hearing Questionnaire, Audiological assessment and a record review of base line hearing test (pure tone audiogram) and noise levels at locations of work and residence lived i.e. round the clock noise exposure. Subjects with other causes of hearing impairment like, otitis media, post high grade fever, metabolic disorders and history of ototoxicity were excluded from the study.
Results: A significant difference in prevalence of hearing loss (more than 30db) between the noise exposed and non noise exposed group (P <0.5) was noted.
Conclusion: Aggressive hearing conservation measures are required for these aviation workers; they are like (a) Availability of HPD’s (b) Ban on "Non Certified" aircraft operations as specified by ICAO Chapter 3, Annex-16.
KEY WORDS:
Noise, Noise Pollution, Sensory Neural Hearing Loss (SNHL), Aviation, Aviation Noise, Aviation workers.Pak J Med Sci July - September 2008 Vol. 24 No. 4 525-530
How to cite this article:
Siddiqui IA, Siddiqui RA. The effect of excessive noise exposure on the hearing thresholds of aviation workers in Karachi. Pak J Med Sci 2008;24(4):525-30.
1. Imtiaz Ather Siddiqui,
2. Riaz Ahmed Siddiqui,
1-2: Department of Ear, Nose,
Throat & Head and Neck Surgery,
Jinnah Postgraduate Medical Centre,
Karachi – Pakistan.
Correspondence
Imtiaz Ather Siddiqui,
Email: siddykee@yahoo.com
* Received for Publication: November 13, 2007
* Accepted: June 18, 2008
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