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KMID : 0974619990170020041
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Bulletin of Dongnam Health University
1999 Volume.17 No. 2 p.41 ~ p.49
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Propagation Characteristics of Noises and Vibrations Emitted from Construction Works
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Hwang Kyung-Chul
Park Joon-Cheol
Kim Im-Soon
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Abstract
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Noises and Vibrations of the machines that have been used at construction works became the target of investigation. Noises and Vibrations were measured at three points(5, 10, 20 m) in a straight line that were based on distance from the source and recorded on magnetic tape at one point(5 m). Measured data were analyzed to assess the sound and vibration levels occurred at sources and applied to gain coefficients of equations that were used for predicting sound and vibration level. Noises and vibrations of pile drivers were measured 98.1(Leq, dBA), 108(Lmax, dBA) sound level and 83.8(Leq, dBV), 88.7(Lmax, dBV) vibration level at 5 m. Distance attenuation is different each one. Data recorded on tapes were analyzed to understand the characteristics of frequency because these characteristics are important factors to design a plan for installing sound and vibration-proof devices. Central frequency of noise is 2 kHz and that of vibration is 16-63 Hz. Results from these analysis assessment prediction, and methods for propagation characteristics of noises and vibrations emitted from construction works were discussed.
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KEYWORD
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