The prediction of flanking sound transmission below the critical frequency

Davy, John L.; Mahn, Jeffrey; Guigou‐Carter, Catherine; Villot, Michel

doi:10.1121/1.4746945

Cited by 10 publications

(5 citation statements)

References 27 publications

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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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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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“…where and are the dimensions of the element, is the total loss factor of the element, is the resonant radiation efficiency of the element and is the critical frequency of the element. It is important to note that Davy 6 has found errors in the calculation of the radiation efficiency terms presented in Annex B.…”

Section: Calculated Input Data Methodsmentioning

confidence: 99%

Revisions to the EN12354 prediction method of calculating the flanking sound reduction index of lightweight building elements

Mahn

Pearse

2012

The Journal of the Acoustical Society of America

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There is great interest worldwide in using the standard, EN12354 to predict the flanking sound reduction index of lightweight building constructions. However, there are several problems which must be overcome before the prediction method can be accurately applied to lightweight building elements. One problem is that the resonant component of the sound reduction index of lightweight elements must typically be determined for the predictions. Three methods of determining the resonant component which are being considered by COST Action FP0702 have been evaluated. The evaluation was conducted by comparing the predicted flanking sound reduction indices which were calculated using the different methods of calculating the resonant sound reduction index to the measured flanking intensity sound reduction index for a series of elements. The elements included single, homogeneous elements and double leaf elements. The determination of the resonant sound reduction index using a correction factor proposed by CSTB based on the radiation efficiencies of the elements is recommended.

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“…Davy et al [36] (see also Davy [37] and Davy et al [38]) shows that the sound power radiated from a finite panel excited at frequency by a point force is given by…”

Section: Radiation Modelmentioning

confidence: 99%

On the measurement and prediction of rainfall noise

et al. 2021

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This paper concerns the measurement and prediction of rainfall noise with a particular focus on measurements made using the method described in the ISO rainfall noise standard. Rainfall noise is generated by rain impacting on a surface which excites the surface producing noise. Here, several different models for the force produced by a water droplet impacting on a flat inclined surface are presented. These models are designed for the nominal intense and heavy raindrops described in the ISO standard and are validated against experimental measurements. The best-performed models have been incorporated into theoretical methods for predicting the noise produced by rainfall on a flat inclined panel. These methods are used to produce noise level predictions for heavy rainfall on a standard reference test specimen which are compared with experimental measurements and show moderate agreement. These experiments were conducted using the test method described in the ISO standard. Several issues which we encountered implementing this test method are described and a number of suggestions are made to improve this method. Finally, the theoretical models are used to investigate the effect of different parameters on rainfall noise for the purpose of illustrating potential sources of error during testing using the ISO standard method.1 Note that table K1 in Annex K of ref. [5] gives four rainfall type classifications (moderate, intense, heavy and cloudburst). These are attributed to IEC 60721-2-2. However, these classification names and the rainfall characteristics (rainfall rate, typical drop diameter and fall velocity) do not correspond with those given in the current version of IEC 60721-2-2 (published in 2012) which lists 'heavy rain' as having a rainfall rate of < 16 mm.h -1 and 'very heavy rain' as having a rainfall rate < 50 mm.h -1 . No characteristics, other than rain intensity are associated with the different rain classifications in IEC 60721-2-2. However, it is stated that rain, in general, has a droplet size distribution typically 1 mm to 2 mm in diameter, with diameters up to 5 mm to 8 mm in thunderstorms; fall velocities are stated as being typically between 2 m.s -1 and 12 m.s -1 .

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The prediction of flanking sound transmission below the critical frequency

Cited by 10 publications

References 27 publications

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

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

Revisions to the EN12354 prediction method of calculating the flanking sound reduction index of lightweight building elements

On the measurement and prediction of rainfall noise

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