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An Inverse Force Measurement Method to Determine the Injected Structure-Borne Sound Power from an Installation into a Building Element
In structure-borne sound problems in buildings, knowledge of the contact forces between vibrating equipment and a receiving element is often required. When multiplying these forces with the simultaneously measured velocities at the contact points of the equipment, the structure-borne sound power can be determined, which is the quantity governing the sound energy transfer from a source space to a receiving space. Measuring contact forces directly is however not straightforward. Therefore, a structural-acoustical method is used to determine the contact forces inversely. This technique is already used in the automotive industry, but applications in buildings are rather rare. The installation used is a vibrating platform, which induces tonal, low-frequency vibrations into the building. Therefore, the used sound source has to perform well for low frequencies. The resulting forces are used for structure-borne sound power calculation and verified by comparing the sound pressure, caused by this injected power, with measured sound pressure.
An Inverse Force Measurement Method to Determine the Injected Structure-Borne Sound Power from an Installation into a Building Element
In structure-borne sound problems in buildings, knowledge of the contact forces between vibrating equipment and a receiving element is often required. When multiplying these forces with the simultaneously measured velocities at the contact points of the equipment, the structure-borne sound power can be determined, which is the quantity governing the sound energy transfer from a source space to a receiving space. Measuring contact forces directly is however not straightforward. Therefore, a structural-acoustical method is used to determine the contact forces inversely. This technique is already used in the automotive industry, but applications in buildings are rather rare. The installation used is a vibrating platform, which induces tonal, low-frequency vibrations into the building. Therefore, the used sound source has to perform well for low frequencies. The resulting forces are used for structure-borne sound power calculation and verified by comparing the sound pressure, caused by this injected power, with measured sound pressure.
An Inverse Force Measurement Method to Determine the Injected Structure-Borne Sound Power from an Installation into a Building Element
Schevenels, Pieter (author) / van der Linden, Peter J. G. (author) / Vermeir, Gerrit (author)
Building Acoustics ; 17 ; 199-219
2010-09-01
21 pages
Article (Journal)
Electronic Resource
English
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