森林工程2017，Vol.33Issue(3)：104-109,6.
城市道路交通噪声频率特性及分布
Frequency Characteristics and Distribution of Urban Road Traffic Noise
摘要
Abstract
In order to investigate the frequency and distribution characteristics of urban road traffic noise,this paper selects 8 roads of 4 areas in Harbin to carry out frequency monitoring.The sound energy and frequency center of gravity formulas are used to analyze low,middle and high frequency energy distribution and frequency center of the roads.The results show that the sound energy of urban road traffic noise is mainly low and middle frequency and the low frequency plays a dominant role.Furthermore,the frequency center of gravity is distributed in 100~400 Hz and is mainly distributed in 200~250 Hz.Attenuation of noise frequency varies with the increase of horizontal distance.The greater the distance is,the more the frequency attenuates.Traffic noise frequency of different types of roads varies with speed,vehicle flow and vehicle type and the influence of various factors should be considered while analyzing noise frequency characteristics.The study on the frequency characteristics and distribution of road traffic noise with different frequency will provide a theoretical basis for choosing a more reasonable noise reduction method based on the traffic noise frequency characteristics.关键词
道路交通噪声/频率特性/声能量/频率重心Key words
Urban road traffic noise/frequency/sound energy/frequency center of gravity分类
交通工程引用本文复制引用
孙凤英,苏男..城市道路交通噪声频率特性及分布[J].森林工程,2017,33(3):104-109,6.基金项目
哈尔滨市科技局学科带头人专项基金项目(2012RFXXS089) （2012RFXXS089）
