Acta Oto-Laryngologica
ISSN: 0001-6489 (Print) 1651-2251 (Online) Journal homepage: http://www.tandfonline.com/loi/ioto20
Noise-Induced Hearing Loss in Danish Brewery Workers J. Rosborg To cite this article: J. Rosborg (1978) Noise-Induced Hearing Loss in Danish Brewery Workers, Acta Oto-Laryngologica, 86:sup360, 102-104, DOI: 10.3109/00016487809123486 To link to this article: http://dx.doi.org/10.3109/00016487809123486
Published online: 08 Jul 2009.
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Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=ioto20 Download by: [University of California Santa Barbara]
Date: 03 April 2016, At: 02:36
Acta Otolaryngol, Suppl. 360: 102-104, 1979
NOISE-INDUCED HEARING LOSS IN DANISH BREWERY WORKERS
J. Rosborg From The United Brewwies, Copenhagen,Denmurk
Downloaded by [University of California Santa Barbara] at 02:36 03 April 2016
Absrracr. An original computer-fitted diagnosis system for
registration of noise-induced hearing loss (NIHL) is presented and compared with the tested persons’ subjective hardness of hearing. Among 6904 brewery workers it was found that people below 40 years only contract little NIHL during the first 5 years of noise exposure. The NIHL after more than 5 years of noise exposure is of the same magnitude as the hearing loss resulting from IC-20 years of age. The NIHL in older age groups was of a minor degree. Permanent use of hearing protectors was associated with good hearing, but the data suggest that good hearing might be the cause and not the effect of the use of hearing protection.
As part of the noise abatement scheme in the Carlsberg and Tuborg Breweries in Copenhagen, pure tone audiometry has been performed since 1973.
MATERIAL AND METHOD During the first year, 6904 workers were examined, which is close to 100% of all employees. A thorough medical history with regard to ear- and hearing disorders was taken by audiometrists. Pure tone octave audiometry covering the frequency range 250-8000 Hz, and also including 6000 Hz, was carried out in soundproof booths with a sound level not exceeding 35 dB (A), by means of Madsen TAN 60 audiometers calibrated in accordance with I S 0 R389. TDH 39 earphones in circumaural muffs ME70 were used. Bone conduction and Weber tests were used to appropriately determine the hearing losses as being either conductive or perceptive. In order to avoid a significant TTS, all tests were performed at the very start of a working day. A diagnosis system fitted for EDP-proA
ISSN: 0001-6489 (Print) 1651-2251 (Online) Journal homepage: http://www.tandfonline.com/loi/ioto20
Noise-Induced Hearing Loss in Danish Brewery Workers J. Rosborg To cite this article: J. Rosborg (1978) Noise-Induced Hearing Loss in Danish Brewery Workers, Acta Oto-Laryngologica, 86:sup360, 102-104, DOI: 10.3109/00016487809123486 To link to this article: http://dx.doi.org/10.3109/00016487809123486
Published online: 08 Jul 2009.
Submit your article to this journal
Article views: 4
View related articles
Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=ioto20 Download by: [University of California Santa Barbara]
Date: 03 April 2016, At: 02:36
Acta Otolaryngol, Suppl. 360: 102-104, 1979
NOISE-INDUCED HEARING LOSS IN DANISH BREWERY WORKERS
J. Rosborg From The United Brewwies, Copenhagen,Denmurk
Downloaded by [University of California Santa Barbara] at 02:36 03 April 2016
Absrracr. An original computer-fitted diagnosis system for
registration of noise-induced hearing loss (NIHL) is presented and compared with the tested persons’ subjective hardness of hearing. Among 6904 brewery workers it was found that people below 40 years only contract little NIHL during the first 5 years of noise exposure. The NIHL after more than 5 years of noise exposure is of the same magnitude as the hearing loss resulting from IC-20 years of age. The NIHL in older age groups was of a minor degree. Permanent use of hearing protectors was associated with good hearing, but the data suggest that good hearing might be the cause and not the effect of the use of hearing protection.
As part of the noise abatement scheme in the Carlsberg and Tuborg Breweries in Copenhagen, pure tone audiometry has been performed since 1973.
MATERIAL AND METHOD During the first year, 6904 workers were examined, which is close to 100% of all employees. A thorough medical history with regard to ear- and hearing disorders was taken by audiometrists. Pure tone octave audiometry covering the frequency range 250-8000 Hz, and also including 6000 Hz, was carried out in soundproof booths with a sound level not exceeding 35 dB (A), by means of Madsen TAN 60 audiometers calibrated in accordance with I S 0 R389. TDH 39 earphones in circumaural muffs ME70 were used. Bone conduction and Weber tests were used to appropriately determine the hearing losses as being either conductive or perceptive. In order to avoid a significant TTS, all tests were performed at the very start of a working day. A diagnosis system fitted for EDP-proA
