The Feasibility Study of the Radio Frequency Noise Exposure Assessment Applied in PCB Plant

• Main Authors: Tzu-wen Chung, 莊子文
• Other Authors: Peng-Yau Wang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/29478476518933620914

碩士 === 國立中央大學 === 環境工程研究所碩士在職專班 === 96 === In PCB manufacturing, many workers work at noisy environments. For example, cutting and punching machines can create up to 95dB noises. Working in these environments for years may result in severs hearing loss. Therefore, understanding the noise exposure levels and identifying exact locations that causes excess exposures are keys to create meaningful noise protection programs. However, current noise exposure assessment methods only provide dose levels and durations. They do not provide such information that can help to pinpoint the hot spots of noise. The SWEETLAB, NCU has many years experiences in developing radio frequency identification based exposure assessment methods (The Radio Frequency Exposure System, RFES) which can detect the position of a worker and can measure the personal and local noise level in that position. The purposes of this study are to test the feasibility of using the RFES in PCB factory, and to understand the exposure levels and activity patterns of workers in the high noise area. The field tests showed that the accuracy of the REFS to identify worker’s positions reached 97.92%. Furthermore, noise exposure levels measured by personal dosimeter were no statistically significant different than that measured by the REFS. The difference between two methods was only 0.5 dB, and is less than the detection error of the sound level meter used in the REFS. These results confirmed that the REFS was able to identify workers’ locations and to measure the noise exposure levels in PCB manufacture.