低噪声沥青路面吸声特性研究  

Primary investigation on sound-absorption character of low-noise asphalt pavement

作　　者：马保国[1] 魏定邦[1] 李相国[1] 罗忠涛[1] 张慢[1] 刘新权[1] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,湖北武汉430070

出　　处：《新型建筑材料》2009年第8期18-20,共3页New Building Materials

基　　金：国家"863"项目资助(2006AA11Z117)

摘　　要：通过混响室法测试了低噪声沥青路面的吸声系数,研究了低噪声沥青路面的噪声特征,并与驻波管法测试结果进行了比较。引用圆管模型对吸声系数的影响因素进行了解释。结果表明,低噪声沥青路面降噪系数为0.45,比普通混凝土路面理论降噪6.79dB。混响室法测得吸声系数在中高频段要稍高于驻波管法所得结果。Sound absorption coefficient of Low-noise asphalt pavement are tested by reverberation way in this paper, compared with standing wave instrument way. And the noise characteristic of Low-noise asphalt pavement is studied. Round pipe model is used to explain the contribution of influencing factor to sound absorption coefficient. The result showed that NRC of low-noise asphalt pavement is 0.45,6.79 dB lower than that of common concrete pavement theoretically. The result tested by reverberation way is a little bit higher than that tested by standing wave instrument way in medium-high frequency.

关 键 词：混响室法 驻波管法 吸声系数 圆管模型 沥青路面 

分 类 号：TQ172.1[化学工程—水泥工业]