Title: The effect of the structure-borne sound transmission between panel and stud via screw connections for a double leaf partition

Author(s): WANG Jiqing; GU Qiangguo;

Affiliation(s): Institute of Acoustics, Tongji University; Shanghai Construction Design and Research Institute;

Abstract: In additional to the screw connection affecting the sound transmission characteristics of the panel-stud partition, the spacing of screws is also considered as a factor in predicting the sound insulation of the partition. It can be modeled either as a series of independent point connections, or as a line connection depending on the screw spacing. For small screw spacing, the connection between panel and stud can be treated as a line connection, from which a higher sound transmission effect can be achieved. Whilst for a larger screw spacing, it can be treated as an independent point connection, from which a lesser sound transmission through the partition can be achieved accordingly. The distinction between these two kinds of connection is also related to the frequency. Usually, half bending wavelength of a panel will be treated as a distinct frequency. Experimental results of double leaf partition with diverse screw spacing significantly demonstrated their influences on sound reduction. Some prediction methods for partitions with different screw spacing are also reviewed in this paper. It should be noted that the impact of screw spacing effecting on the sound insulation of partitions of wood stud and light-weight metal stud is different.