Measurement of the Dynamic Stiffness of Porous Materials Taking into Account their Airflow Resistivity


          

刊名：Noise Notes
作者：Charlotte Crispin（Belgian Building Research Institute (BBRI) - Acoustics Division）
Christian Mertens（Belgian Building Research Institute (BBRI) - Acoustics Division）
Juraj Medved（STU Bratislava, Faculty of Civil Engineering, Department of Building Structures）
刊号：715C0033
ISSN：1475-4738
出版年：2014
年卷期：2014, vol.13, no.3
页码：181-190
总页数：10
分类号：X8
语种：eng
文摘：The dynamic stiffness of a resilient material used under a floating floor is often used to predict the improvement of the impact sound pressure level, L. It is also used to compare products. The measurement accuracy of this parameter is therefore essential. Unfortunately, the comparison between the predicted and the measured L results shows quite high deviations which could be attributed, in part, to an incorrect estimation of the dynamic stiffness. It is now accepted by all European laboratories that the measurement procedure described in the standard ISO 9052-1 should be reviewed. This paper proposes a first step in the improvement of the measurement setup by taking into account the actual contribution of the dynamic stiffness of the air enclosed in the materials on the total dynamic stiffness. A new setup is proposed and some results are presented for products with different airflow resistivities.



©2016机械工业出版社（机械工业信息研究院） 京ICP备05055788号-35