Ann. occup. Hyg., Vol. 47, No. 4, pp. 255-259, 2003
© 2003 British Occupational Hygiene Society
Published by Oxford University Press
Commentary: The 1971 BOHS Hygiene Standard for Wide-band Noise
Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, UK
Received 15 February 2003; in final form 8 March 2003
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| INTRODUCTION |
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For some considerable time, it has been recognized that noise can damage hearing. One manifestation of such damage is loss of hearing sensitivity, termed noise-induced hearing loss. This form of hearing loss is caused by dysfunction of the hair cells in the cochlea or inner ear; the loss affects the hearing for high frequencies; and the loss is usually about equal in degree for the two ears. The damage to hearing grows quickly over the first years of noise exposure, and thereafter slowly approaches a maximum loss associated with noise level. Once the noise exposure stops, the progression of the hearing loss stops. Occupational hearing loss due to noise exposure is, however, a preventable injury; reduction of noise level or noise duration can lessen or eliminate the risk of hearing damage. With an eye to preventing this occupational disease, present hearing conservation noise assessments are based upon a simple statement:
| A BRITISH DAMAGE RISK CRITERION |
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| AN AMERICAN DAMAGE RISK CRITERION |
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| NEW CONCEPTS FROM THE NATIONAL PHYSICAL LABORATORY |
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| THE HYGIENE STANDARD FOR WIDE-BAND NOISE |
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| LATER DEVELOPMENTS |
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| A FINAL COMMENT |
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