A practical characterisation for vibro-acoustic sources in buildings
A practical characterisation for vibro-acoustic sources in buildings
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发表时间：
2007
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通讯作者：
B. Gibbs;N. Qi;A. Moorhouse
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作者：
B. Gibbs;N. Qi;A. Moorhouse
本文考虑了一个实用的结构声源特性的机械装置在建筑物中。这种机器几乎总是安装在与重型同质结构地板和墙壁，或浮动地板系统，或加强空腔结构接触。制造商需要一个基于实验室的测量程序，该程序将产生源强度的单个值，其形式可转换为对安装条件下产生的声功率的预测，从而预测远离源的房间中的声压。提出了一种新的接收板方法，该方法以接触点上自由速度平方和的形式产生源活动。此外，源极迁移率单独获得的有效迁移率的大小的平均值，在接触点。这两个量都可以用来估计建筑物中可能遇到的接收器移动范围的安装功率。它表明，安装功率可以通过参考高源迁移率条件，低源迁移率条件，或匹配的迁移率条件估计。
This paper considers a practical structure-borne sound source characterisation for mechanical installations in buildings. Such machines nearly always are installed in contact with heavyweight homogeneous structural floors and walls, or floating floor systems, or stiffened cavity constructions. Manufacturers require a laboratory-based measurement procedure, which will yield single values of source strength in a form transferable to a prediction of the sound power generated in the installed condition, and thence the sound pressure in rooms removed from the source. A novel reception plate method is proposed which yields the source activity in the form of the sum of the squared free velocities, over the contact points. In addition, the source mobility is obtained separately as the average of the magnitude of the effective mobility, over the contact points. Both quantities can be used to estimate the installed power for the range of receiver mobilities likely to be encountered in buildings. It is demonstrated that the installed power can be estimated by reference to a high source mobility condition, a low source mobility condition, or to a matched mobility condition.