Improvement of sound insulation of doors or windows by absorption treatment inside the peripheral gaps

Acoustical Science and Technology

Takumi Asakura¹  Shinichi Sakamoto² 

[1] Institute of Technology, SHIMIZU Corporation;Institute of Industrial Science, the University of Tokyo

关键词: Leak transmission;    Absorption treatment;    Gap;    Finite-difference time-domain method;   

DOI  :  10.1250/ast.34.241

学科分类：声学和超声波

来源: Acoustical Society of Japan

【 摘 要 】

References(21)Cited-By(2)Slit-shaped gaps included in building elements such as doors or windows are apt to deteriorate the sound insulation performance of the wall system. In order to reduce sound energy transmitted through these parts, one of the practical measures is to place sound absorption materials inside the gaps. In this study, the effect of such an absorption treatment was examined through numerical and experimental studies. In the numerical study, the effect of sound absorption treatment inside the gaps existing around doors/windows was examined by applying the finite-difference time-domain (FDTD) method. To examine the results of the numerical study, a full-scale model experiment was performed with the sound intensity measurement method. In addition, a case study was performed to confirm the effect of absorption treatment of the peripheral gap of a door set in a real office space, and the effect was also confirmed by numerical study and measurement. As a result, it was found that sound insulation degradation caused by sound transmission through the gaps can be improved by sound absorption treatment inside the gaps.

【 授权许可】

Unknown