汽車修理業勞工噪音暴露量暨聽力損失之調查

• Main Author: 譚世坪
• Other Authors: 黃東榮
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/41692315317981376434

碩士 === 文化大學 === 勞工研究所 === 82 === 　　The purpose of this research is to evaluate the noise exposure level and the loss of hearing ability for labourers in the automotive repair industry. It is intended to be a reference for the health management of the automotive repair industry. Five categories were selected according to the automotive repair equipments; body shops, grade A repair factories, grade B repair factories, maintenance shops, and material suppliers. Periodic tests and questionnaire were conducted. One grade A repair factory was selected for the hearing loss tast and the analysis of hearing loss at various frequency. 　　The results of this research could be categorized into three areas: 　　(1)results from environmental noise level tests 　　(2)results from labourers'' loss of hearing ability tests 　　(3)results of the questionnaires 　　The analysis is described in the following paragraphs: 　　Ⅰ.Test results for environmental noise level 　　　　1.In the factory: 　　　　The noise impact level was greater in the body work department. The highest level was 127 dB. Noise level was more consistent in the spray paint department, where the highest level was 93 dB. Engline running tests produced maximum 107 dB in the first two minutes. Generally speaking, the noise level was acceptable in this area. Most factories did only the maintenance work and some adjustment jobs, which did not require works like spray paint, body soldering, etc. 　　　　Therefore the two departments mentioned above produced higher noise level than other departments. For labourers'' noise exposure level, one person received a noise level of 98 dB(A), which exceeded the legal noise limit. It represented 1% of the test group. 　　　　2.Outside the factory: 　　　　Daytime noise limitation for the third restriction area was 70 dB, and it was 80 dB for the fourth restriction area. The noise level in test factories was within environmental standard during the test period. which suggested the noise damage was not significant according to related regulations. 　　Ⅱ.Results from labourers'' hearing loss tests 　　　　1.There is a relationship between the pre age-calibration hearing loss and the labourers'' working years and their ages. 　　　　2.Regarding to various frequencies, labourers'' working years and the pre age-calibration hearing loss did not have much difference at 500 Hz. However, there were significant differences at 1000 Hz, 2000 Hz, 4000 Hz, and 6000 Hz. 　　　　3.There were siqnificant differences between the labourers'' ags and the pre age-calibration hearing loss at various frequencies. 　　　　4.There was no difference among departments on hearing loss at various frequencies. 　　　　5.There was no obvious relationship between noise exposure in different departments and hearing loss (age-calibrated). 　　　　6.The individual noise exposure dosage and the work year product did not show any statistical significance with the hearing loss levels (age-calibrated) obtained by left, right year four and six parted methods. This might be due to one day noise exposure dosage. Therefore, it could not represent a long term exposure dosage. 　　Ⅲ.Statistical results from questionnaires. 　　　　1.The most serious influential factor in working environment was air pollution. Noise was the second most serious factor. 　　　　2.31% of labourers perceived excessive amount of noise. Mechanically, they thought body work and emery wheel machines produced higher noise level. 　　　　3.For the influences that noise brought to our daily lives, labourers thought it had more effect on thinking, conversation, and sleep. 　　　　4.The noise perceived level was higher during summer time. (Most companies felt that the work load did not differ much between high and low seasons)