城市主要道路交通噪声测试及分布规律

采用噪声与振动测试分析系统,进行城市主要道路交通噪声测试及分析,通过测试分析得知,平直路段道路两侧交通噪声的等效声压级在同一时段相差不大,道路噪声在1 600 Hz内达到峰值67.1 dB（A）.交叉路口噪声在3 150 Hz达到峰值67.2dB（A）,在2500～5 000 Hz范围内易出现阶段性峰值.同一路段中,上坡路段的噪声值普遍高于下坡路段噪声值.坡路上测点噪声值在1 250 Hz以下呈阶段式上升,在1 250 Hz出现峰值,即上坡路段噪声峰值为66.8 dB（A）,下坡路段噪声峰值为59.5 dB（A）,在2500～5 000 Hz范围内波动较大,易出现阶段性噪声峰值.在315 Hz以下,隧道入口处噪声值普遍高于隧道出口处.隧道入口处噪声在1 250 Hz达到峰值66.8 dB（A）,隧道出口处噪声在1 000 Hz达到峰值71.1 dB（A）.

Study of Noise Test and Distribution Characteristics in Main Urban Traffic Road

Using noise and vibration test and analysis system,an urban main road traffic noise was studied.The traffic noise of the flat and straight road has no different LAeq in the same time interval on both sides of road with the peak value of 67.1 dB （A） at 1 600 Hz.The noise of crossroad has the peak value of 67.2 dB （A） at 3 150 Hz.From 2 500 Hz to 5 000 Hz,it easily has the peak value in stage.In the same road,the traffic noise in uphill is generally higher than that in downhill.Under 1 250 Hz,the noise level of station assumed the type up in stage with the uphill and downhill peak values of 66.8 dB （A） and 59.5 dB （A） at 1 250 Hz,and under 315 Hz,the traffic noise near tunnel entrance is generally higher than it near tunnel exit,and the peak values near the tunnel entrance and near tunnel exit are 66.8 dB（A） at 1 250 Hz and 71.1 dB（A） at 1000 Hz.