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原文传递 Mapping Heavy Vehicle Noise Source Heights for Highway Noise Analysis

题名：	Mapping Heavy Vehicle Noise Source Heights for Highway Noise Analysis
作者：	Donavan, P. R.; Janello, C. J.
关键词：	Heavy vehicles##Noise pollution##Noise sources##Mapping##Height distributions##Trucks##Buses##Traffic noise levels##Data collection##Acoustic beamforming##Transportation Noise Model (TNM) acoustical code##
摘要：	NCHRP Research Report 842 deals with two primary objectives: (1) determining height distributions and spectral content for heavy vehicle noise sources and (2) establishing and beginning development of an extended heavy vehicle (truck and bus) noise source database for incorporation into traffic noise models, including future versions of the Federal Highway Administration (FHWA) Transportation Noise Model (TNM) acoustical code. To accomplish these objectives, the researchers collected data by sampling commonly used heavy vehicles representing the current national fleet across the country. The research used data collection and analysis methods reflecting the current state of technology in acoustic beamforming. Heavy vehicles (trucks and buses) are significant contributors to overall traffic noise levels; noise from one heavy truck is equivalent to noise from about 10 passenger cars. Therefore, a thorough understanding of how heavy vehicles emit noise is crucial to predicting and mitigating traffic noise.
总页数：	267
报告类型：	科技报告