权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

A study on the sound shielding efficiency of a partition faced to the anisotropic sound field

面向各向异性声场的隔墙隔声效率研究

基本信息

批准号：
60550409
负责人：
FUJIWARA Kyoji
金额：
$ 1.41万
依托单位：
Kyushu Institute of Design
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550409/
关键词：
Transmission loss SPL difference between rooms Sound insulating material 非拡散音場

项目摘要

This report is in concern with the study on the effects of absorption distribution over the boundaries of the rooms divided by the partition wall on its shielding efficiency and on the sound pressure level difference between these rooms. In this study, the sound fields in the coupled rooms separated by the partition wall were analyzed by the integral equations in the order of energy for several different distribution conditions of absorption coefficients over the room boundaries.The results obtained are as follows: Notwithstanding a constant equivalent absorption area in both rooms, the difference between SPLs may amount to 8dB, which is caused by the differences of the absorption distribution on the boundaries. In the case of transmission loss evaluated by the analysis of integral equations, the difference may amount to 5dB. These results were experimentally verified with the aid of using the scale model reverberation chambers. And it is concluded that there is the optimum distribution of absorption coefficient over the room boundary for obtaining the highest sound insulation efficiency of the partition wall.

这份报告是关于被隔墙分隔的房间的边界上的吸收分布对其屏蔽效率和这些房间之间的声压级差的影响的研究。本文针对几种不同的吸声系数在房间边界上的分布情况，采用能量级积分方程，对被隔墙分隔的耦合房间内的声场进行了分析，得到了如下结果：尽管两个房间的等效吸收面积恒定，但SPL之间的差异可能达到8dB，这是由边界上吸收分布的差异引起的。在通过积分方程的分析来评估传输损耗的情况下，差异可以达到5dB。利用缩尺模型混响室对上述结果进行了实验验证。结果表明，为使隔墙的隔声效果最佳，吸声系数在房间边界上存在一个最佳分布。