同一实验室条件下不同隔声测量方法的探讨  

Two methods for sound insulation measurement in same laboratory condition

作　　者：钱中昌[1,2] 寇毅伟 刘碧龙[1] 刘克[1] 

机构地区：[1]中国科学院声学研究所噪声与振动重点实验室,北京100190 [2]上海市计量测试技术研究院,上海201203

出　　处：《声学技术》2013年第6期495-499,共5页Technical Acoustics

基　　金：国家重点基础研究发展规划项目(2012CB720204)

摘　　要：大型构件隔声量的实验室测量有两种方法:一种是传统的隔声室测量方法,可参照国家标准GB/T 19889.3-2005;另一种可称之为声强法,可参照国际标准ISO 15186-1:2000。参照以上两种方法,分别测量了三块板的隔声量。结果发现,在中高频段,两种方法测量结果几乎一致,而在低频段(300Hz以下),声强扫描法测量结果明显低于传统方法。为了找出造成低频段测量结果差异的原因,还研究了吸声材料、探头间距等因素对测量结果的影响。There are two methods for measuring the sound reduction index （SKI） of large partitions. One is a conven- tional method which requires a sound proof chamber by reference to GB/T 19889.3-2005; the other is called sound in- tensity method by reference to ISO 15186-1：2000. The SRIs of three panels are measured according to these two me- thods. The results indicate that the SRI is almost consistent with the two methods in the middle and high frequency re- gion. When the frequency is below 400 Hz, the SRI measured by sound intensity method is less than that measured by the conventional method. The effects of sound absorbing materials and the distance of spacers used in sound intensity probe are also investigated.

关 键 词：声强法 吸声材料 隔声量 

分 类 号：TB53[理学—物理]