【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。更多还原

【Abstract】 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.更多还原