Application of the CEN draft building acoustics prediction model to a lightweight double leaf construction

Nightingale, T.R.T.

doi:10.1016/0003-682x(95)00026-6

Cited by 11 publications

(13 citation statements)

References 2 publications

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“…However, for the case of lightweight structures it may be important to use two different values depending on the radiation side. This is suggested in [3,4] and corroborated here on the basis of a numerical simulation.…”

Section: Introductionsupporting

confidence: 83%

“…This regulation applies to heavy structures, not to lightweight structures. However, [3] and [4] suggest that the extension of EN12354 to lightweight structures should rely on the use of adequate values of the radiation efficiency. The results presented here illustrate that the radiation efficiency can be different for the two faces of an asymmetrical structure.…”

Section: The Role Of Beams In the Radiation Of A Surfacementioning

confidence: 99%

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Numerical modelling of the radiation efficiency of asymmetrical structures

et al. 2009

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The radiation efficiency of a structural element is required by some models in order to predict its sound insulation. A common assumption is that the radiation on both sides of the element is the same. This is not true for asymmetrical structural elements like lightweight floors consisting of a beam-supported flat board. The radiation efficiency is larger on the beam side, because the beams act as exciters and increase the pressure level in the room. These different radiation efficiencies are calculated here for a two-dimensional cross-section by using finite elements and boundary elements. The obtained preliminary results illustrate that considering a single radiation efficiency can be a source of errors and that further investigation is required in order to improve predictions.

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Section: Introductionsupporting

confidence: 83%

Section: The Role Of Beams In the Radiation Of A Surfacementioning

confidence: 99%

Numerical modelling of the radiation efficiency of asymmetrical structures

et al. 2009

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“…vibration transmission from a floor to each of the parts of a double wall can be different) or radiation efficiencies can be different depending on the shape in each side of a wall [31,32]. Other aspects that are important to adapt current techniques and regulations for lightweight constructions are discussed in [33,34,11,35].…”

Section: Introductionmentioning

confidence: 99%

Using spectral finite elements for parametric analysis of the vibration reduction index of heavy junctions oriented to flanking transmissions and EN-12354 prediction method

Poblet-Puig

Guigou‐Carter

2015

Applied Acoustics

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The vibration reduction index of heavy junctions is predicted by means of a model based on spectral finite elements. This is equivalent to a finite element method but faster and with smaller computational costs. This advantage is used in order to perform a parametric analysis of the vibration reduction index for several junction types: T-shaped, L-shaped and +-shaped. The influence of several parameters such as: damping, junction dimensions or the mass ratio on the vibration reduction index is observed. The study is focussed to provide data and guidelines oriented to the EN-12354 design method for flanking transmission in buildings.

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“…Reciprocity between the calculated flanking transmission loss terms in each direction was used to exclude the radiation efficiency terms from the calculations such that [5]: (3) where is the estimation of the measurand according to EN12354-1. Eq.…”

Section: Introductionmentioning

confidence: 99%

“…(3) was written under the assumption that , even for lightweight building elements [6] which may have critical frequencies above the frequency range of interest. Other authors [5,7] have suggested that the assumption of reciprocity may be acceptable for the heavy monolithic constructions for which EN12354-1 was intended, but may not be applicable to lightweight building constructions. The possible lack of reciprocity for lightweight structures is due in part to the vibration transmission factors which may differ significantly in each transmission direction for lightweight building elements [8].…”

Section: Introductionmentioning

confidence: 99%

Reciprocity and the Prediction of the Apparent Sound Reduction Index for Lightweight Structures According to EN12354

Mahn

Pearse

2008

The Journal of the Acoustical Society of America

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EN12354 makes use of reciprocity to cancel the radiation efficiency terms from the equations used to predict the apparent sound reduction index. The use of reciprocity works well for the application of EN12354 to massive, concrete structures with diffuse wave fields and with critical frequencies below the frequency range of interest. However, lightweight constructions may have critical frequencies above the frequency range of interest and may not support diffuse wave fields. The use of reciprocity for application to lightweight structures may introduce errors into the predictions. This study investigates the uncertainty introduced into the predictions of the apparent sound reduction index of lightweight constructions due to the use of reciprocity.

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Application of the CEN draft building acoustics prediction model to a lightweight double leaf construction

Cited by 11 publications

References 2 publications

Numerical modelling of the radiation efficiency of asymmetrical structures

Numerical modelling of the radiation efficiency of asymmetrical structures

Using spectral finite elements for parametric analysis of the vibration reduction index of heavy junctions oriented to flanking transmissions and EN-12354 prediction method

Reciprocity and the Prediction of the Apparent Sound Reduction Index for Lightweight Structures According to EN12354

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