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dc.contributor.authorConta, Simone
dc.contributor.authorHomb, Anders
dc.description.abstractThe timber building industry is developing building systems for urban buildings with open architecture based on long span floor systems. Span length can be increased with constant cross section by combining stiff floor elements e.g. hollow-box floors with supports that provide high rotational stiffness. Detailed knowledge of the vibroacoustic behavior of such a system is not available and is needed to design buildings that fulfill the requirements in an economic and sustainable way. We set up a prototype and performed experimental investigations to identify the modal properties of such a system and to gain understanding of the sound radiation properties under impact excitation. The measurements were performed in an industrial hall using experimental modal analysis (EMA) and the Integral Transform method (ITM). The results highlight the limitation of standard acoustic laboratories and show the importance of using advance measurement methods to acquire reliable data. The size of the element and the boundary condition clearly affect the radiated sound power at low frequencies. Sound radiation can be efficiently reduced above 50 Hz by using traditional strategies such as gravel in the cavity of the floor elements. Additionally, insights about the ITM are presented, showing that symmetry cannot be exploited and that there is no requirement for a baffle when impact excitation is under investigationnb_NO
dc.rightsCC BY 4.0*
dc.subjectTimber hollow-box floornb_NO
dc.subjectExperimental modal analysisnb_NO
dc.subjectIntegral transform methodnb_NO
dc.subjectRadiated sound powernb_NO
dc.subjectImpact noise levelnb_NO
dc.titleSound radiation of hollow box timber floors under impact excitation: An experimental parameter studynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.rights.holder© 2019 The authorsnb_NO
dc.subject.nsiVDP::Teknologi: 500nb_NO
dc.source.journalApplied Acousticsnb_NO
dc.relation.projectNorges forskningsråd: 254699nb_NO
cristin.unitnameArkitektur, byggematerialer og konstruksjoner

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CC BY 4.0
Except where otherwise noted, this item's license is described as CC BY 4.0