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Key Words: noise barrier, road traffic noise, low noise pavement, porous asphalt, diffraction, interference, noise reduction, BEM, visualization

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DEVELOPMENT OF SMALL NOISE BARRIER WITH ANTI-RESONANCE TUBE

Hiroshi SHIMA, Toshiyuki WATANABE, Teruhiko MARUYAMA

New type of a noise barrier of 0.5 meter width with resonance tube is developed. The barrier shows noise reduction by 2dB on road traffic noise on porous asphalt pavement. Noise redution of the barrier of 3 meter height equals that of a ordinary noise barrier of 4.5 -5 meter height. The barrier reduces diffraction noise by interference and has no absorption materials and the barrier has a transparent type. It reduces prevention of sunshine less than its height.

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