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原文传递 Evaluation of the Tilt and Absorbing Noise Barriers on I-78 Sections 5M, 5BW, and 5BY in Union County, NJ; Final rept. Jul 86-Aug 89

题名：	Evaluation of the Tilt and Absorbing Noise Barriers on I-78 Sections 5M, 5BW, and 5BY in Union County, NJ; Final rept. Jul 86-Aug 89
作者：	Marsella, M.
关键词：	Noise control; Noise reduction; Traffic noise; Noise intensity; Highway design; Noise measurement; Noise propagation; New Jersey; Noise generators; Microphones
摘要：	In 1986 New Jersey completed an eight-mile section of I-78 in Union County, which included the construction of two innovative traffic noise barriers. Both barriers were concrete and post-and-panel structures, designed ostensibly to reduce the assumed interaction between parallel barriers which was considered to degrade barrier effectiveness. One barrier was tilted 10 degrees away from the roadway and had a standard hard concrete grapestake finish, the opposite barrier being of the same type. The second type of barrier was vertical and the panels were covered with a proprietary absorbing finish. Some of the opposite barriers had the same finish, while others had a non-absorbing finish. Both innovative barriers were evaluated for their effectiveness in reducing farside noise levels and increasing nearside insertion loss vis-a-vis a standard barrier with a reflective finish. This evaluation was carried out in two phases.
总页数：	107p
报告类型：	科技报告