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原文传递 Preliminary Findings from Noise Testing on PFC Pavements in Texas.

题名：	Preliminary Findings from Noise Testing on PFC Pavements in Texas.
作者：	trevino-frias, m. dossey, t.
关键词：	test methods, traffic noise, noise reduction, pavement surface texture, texas, roads and highways
摘要：	This report documents noise testing performed on Texas pavements in the summer and fall of 2006. Test methods include roadside noise measurement with SPL meters and on-vehicle sound intensity measurement of noise at the pavement tire interface. Comparisons are made between the levels of vehicular noise at the roadside and directly on the source vehicle. The FHWA Traffic Noise Model (TNM) computer program was then used to predict the noise levels at roadside based on the observed traffic and geometry of the roadway, and subsequently compared to the noise as actually measured with precision test equipment. The pavements tested were primarily of the New Generation Open Graded Friction Course type, a permeable asphalt design with air voids in the area of 17 percent, also known as Permeable Friction Course (PFC) in Texas. Preliminary findings indicate that roadside noise levels experienced along PFC pavements are significantly lower than predicted by TNM using either the 'Average' or 'Open Graded' pavement models included in the program. This suggests that further study is warranted to determine whether these pavements retain their acoustic properties over time and wear and, thus, can be reliably used for noise impact avoidance and abatement. / NOTE: Technical rept. (7/2006-1/2007). / Supplementary Notes: See also PB2007-110189. Sponsored by Texas Dept. of Transportation, Austin. Research and Technology Implementation Office. and Federal Highway Administration, Austin, TX. Texas Div. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0718；121p
报告类型：	科技报告