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Noise Induced Hearing Loss, A Result Of Factory Expertise During 5 Years at Antsiranana (Diego-Suarez), Madagascar

INTRODUCTION: The acoustic trauma can be observed in everyday life and in professional life. We know that economic development has a close relationship with the use of noisy equipment. Our goal is to assess the impact of noise in the workplace on the hearing. MATERIALS AND METHODS: This is a cross-sectional study in Antsiranana (Diego Suarez) from March 2015 to March 2019 of workers in a brewery company and manufacture of Coca Cola. Each worker potentially exposed to industrial noise has been the subject of a hearing test after a routine otoscopy examination and possible removal of earwax. We did not include workers with a pre existing condition of the ear. Workers not exposed to noise are also excluded. We studied age, sound mapping of the company, the seniority position, air and bone auditory thresholds. RESULT: Of the 97 individuals included in this study, the majority were aged between 20 and 60 years. The workers were on the job to an average of 15 years. The intensity of ambient noise ranged from 90 dB to 140 dB (average 115 dB). The workers had an average hearing loss of 21.25 dB (12.5 dB in extreme and 33.75 dB), with a predominance of sensorineural hearing loss. CONCLUSION The duration of exposure to noise and the noise level of the working environment are the auditory condition prognosis of workers. The result of this study showed us the inevitable hearing loss over time in front of a chronic exposure to intense noises. Thus prevention is very useful and necessary, and legislation on occupational trauma must be updated periodically. KEYWORDS: noise, workers, trauma, age, hearing

• The duration of exposure to noise and the noise level of the working environment are the auditory condition prognosis of workers.
• prevention is very useful and necessary, and legislation on occupational trauma must be updated periodically.

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Randrianarisoa Theodore (Primary Presenter,Author), SALFA Hospital (Health department of Lutheran Church), trandrianarisoa@gmail.com;
Professional Experience 1996 - 2008 Prevention of Deafness SALFA ANTANANARIVO, Project Coordinator 2010- 2017: Head of the ENT Clinic at Salfa Hospital Publications -Translation and publication: Training Manual PRIMARY EAR CARE, Author: Dr Piet van Hasselt. -Survey of Hearing Impaired in the Province of Antananarivo -Prevention of Hearing impairment National Project (2009) Training 1994 - 1995: University of Oslo Oslo, Norway Audiology / SPECIAL EDUCATION 1995: University of Manchester England DEAFNESS AND HEARING IMPAIRED IN DEVELOPING COUNTRY 1998: University of Cape Town South Africa WORKSHOP ON PRIMARY EAR CARE 1999: University of Manchester England Audiological MEDICINE 2002: GN ReSound GLOBALTECHNICAL OPERATIONS, Denmark HEARING AID TECHNICAL TRAINING SEMINAR 2005: University Hospital Pierre Marie Curie NICE, France Auditory evoked potentials (AEP) 2007: BEIJING, 2009: HASS Ear Institute, Pretoria South Africa NEW BORN HEARING SCREENING, ABR / AABR. 2010: LONDON SCHOOL OF HYGIENE AND TROPICAL MEDICINE, UNIVERSITY OF LONDON, PUBLIC HEALTH PLANNING FOR HEARING IMPAIRMENT.

ASHA DISCLOSURE: Financial - Nonfinancial -

AAA DISCLOSURE: Financial - No relevant financial relationship exists.