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An improved prediction model for the impact sound level of lightweight floors: Introducing decoupled floor-ceiling and beam-plate moment
Acoustic Technology, Department of Electrical Engineering, Technical University of Denmark.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.ORCID iD: 0000-0002-8451-4804
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.ORCID iD: 0000-0001-5435-2069
2011 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959, Vol. 97, no 2, p. 254-265Article in journal (Refereed) Published
Abstract [en]

To better understand the complex acoustic behaviour of lightweight building structures both experimental and theoretical approaches are necessary. Within the theoretical approach developing theoretical models is of great importance. The aim here is to further develop an existing method to predict the impact sound pressure level in a receiving room for a coupled floor structure where floor and ceiling are rigidly connected by beams. A theoretical model for predicting the impact sound level for a decoupled floor structure, which has no rigid mechanical connections between the floor and the ceiling, is developed. An analytical method has been implemented, where a spatial Fourier transform method as well as the Poisson's sum formula is applied to model transformed plate displacements. Radiated sound power was calculated from these displacements and normalized sound pressure levels were calculated in one-third octave frequency bands. The predicted results from the model are compared with the results from the experiments on the decoupled floor-ceiling construction. The results gave agreements in line with comparisons regarding previous model. The effect of introducing beam-plate moment in the model is studied and is found to be dependent on frequency, showing significant improvement in predicting impact sound level at high frequency region.

Place, publisher, year, edition, pages
2011. Vol. 97, no 2, p. 254-265
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Acoustics
Identifiers
URN: urn:nbn:se:ltu:diva-8906DOI: 10.3813/AAA.918405ISI: 000288130700009Scopus ID: 2-s2.0-79952129456Local ID: 774390d2-81b6-4d5b-bb09-111fda487869OAI: oai:DiVA.org:ltu-8906DiVA, id: diva2:981844
Note
Validerad; 2011; 20110321 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Mosharrof, Mohammad SazzadLjunggren, FredrikÅgren, Anders

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