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本文通过1/10缩尺模型,测得点声源在道路上不同位置时居室内之声级,把声源声功率级与室内 声级之差作为衰减量用于交通噪声计算机模拟过程,即得在某种车流状态下居室内声级.通过比较各种 情况下居室内声级,得出阳台及各种改进措施之降噪值.结果表明,在1—5层范围,阳台无实栏板、无吸 声处理情况下,居室内声级反而高于无阳台居室0—2dB.在上述阳台上做1.1m高实栏板及阳台顶贴 一般吸声材料,两者共有2—5dB降噪效果.取消阳台顶板(强吸声),又能增加1—4dB降噪量.对阳 台上也装窗的封闭阳台,在内外窗错位开启通风情况下,相对无阳台居室可有14—15dB附加降噪量.
In this paper, the 1/10 scale model is used to measure the sound level of indoor point sound source at different positions on the road. The difference between the sound power level of the sound source and the indoor sound level is used as the attenuation value in the computer simulation of traffic noise. In a certain traffic conditions, indoor indoor sound level by comparing the sound level of the living room under various conditions, come to the balcony and a variety of improvements in the noise reduction results show that in the 1-5 layer range, , Without sound absorption treatment, the indoor sound level but higher than the balconies 0-2dB bedroom. In the balcony to do 1.1m high solid panels and balconies posted general sound-absorbing materials, both a total of 2-5dB noise reduction Effect cancel the balcony roof (strong sound absorption), but also increase the amount of 1-4dB noise on the balcony is also equipped with closed windows balcony, the window in the case of staggered open ventilation, the relative balcony room can have 14-15dB additional Noise reduction.