Transmission of Random Sound and Vibration through a Rectangular Double Wall

White, Pritchard H.; Powell, Alan

doi:10.1121/1.1910154

Cited by 30 publications

(4 citation statements)

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“…The airborne sound insulation can be calculated from the ratio of the total energy of the transmission and the receiving room. White and Powell [32] modelled the sound insulation of a double-leaf wall based on the SEA approach of Lyon and Maidanik [33], in which the coupling loss factors between the subsystems are based on the work of Lyon and Scharton [34]. Crocker and Price included the mass law in the model of White and Powell by introducing a non-resonant transmission path of the mass-impeded modes of the plate [35].…”

Section: Analytical Modelsmentioning

confidence: 99%

Predicting the sound insulation of finite double-leaf walls with a flexible frame

2018

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With double-leaf wall systems such as plasterboard walls, a high sound insulation can potentially be achieved with a relatively low weight. The accurate sound transmission analysis of this type of wall is challenging since the leafs are usually coupled to a common frame, and since the finite dimensions play a role at lower frequencies. Existing analytical models for sound insulation prediction account for the deformation of the wall in an approximate way, while detailed numerical models are computationally very demanding. In this work, a sound insulation prediction model that achieves a high prediction accuracy at a low computational cost is developed. The wall components that display low geometrical complexity, such as the wall leafs and the cavity, are modelled in a analytical way. Sound absorbents in the cavity are modelled as equivalent fluids. The metal studs, which have a highly deformable cross section, are modelled in full detail with finite elements. The sound fields in the sending and receiving rooms are modelled as diffuse; they are rigorously coupled to the deterministic wall model by employing a hybrid deterministic-statistical energy analysis framework. With the resulting room-wall-room model, the airborne sound insulation is predicted for a range of double-leaf plasterboard walls with single, double and triple plating and with different cavity depths. The obtained transmission losses are validated against the results of an extensive set of experimental tests. A very good agreement between predicted and measured transmission loss values is observed. The single number ratings for the airborne sound insulation for nearly all walls differ from the experimental values by 0 to 2 dB, which is close to the average experimental reproducibility. At the same time, the computational cost is more than three orders of magnitude lower than for recently proposed models of similar accuracy.

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Section: Analytical Modelsmentioning

confidence: 99%

Predicting the sound insulation of finite double-leaf walls with a flexible frame

2018

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“…An extension of the model to a diffuse sound field, involving oblique angles of incidence, was introduced by London [20]. Later on, White and Powel [21] introduced a model for bounded panels, taking into account the resonance effects caused by their dimensions. A statistical mechanical approach into wall structure characteristics has been implemented by Lyon and Maidanik [22].…”

Section: Research Has Been Performed To Achieve the Most Effective Comentioning

confidence: 99%

Assessment of sound insulation of naturally ventilated double skin facades

Urbán¹,

Roozen

Zaťko³

et al. 2016

Building and Environment

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The sound insulation spectrum is analysed of 18 double glazing arrangements facades, of which 9 double skin facades were measured in situ and 9 in a laboratory setting. The influence of the cavity thickness, the parallelism of the two glass panels, the absorptivity of the cavity and the effect of the size of ventilation slots are investigated. The results are compared with double layer wall insulation prediction models. Also a new, simple model is proposed that predicts the sound insulation of naturally ventilated double skin facades, based on the coincidence frequency, the structural resonance frequencies, the cavity resonance frequencies, the façade construction, the dimensions the and material properties. The model predictions are validated by measurement data.

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“…Studies devoted to analyze the dynamic performance and predict the sound insulation capability of double panel systems have existed over half century and more. [1][2][3][4][5] The modeling approaches were either in analytical or numerical forms. For example, Yairi et al 6 analyzed the sound radiation of an infinite double-leaf panel by a Helmholtz integral for acoustic sound field coupled with the classical thin plate theory.…”

Section: Introductionmentioning

confidence: 99%

Vibro-acoustic coupling analysis of dynamic performance of the double panel system with mechanical links

Zhang,

Lyu,

Wang

et al. 2024

Advances in Mechanical Engineering

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The theoretical prediction model for the dynamic performance of a double panel system that takes into account the effect of mechanical links is developed in this paper. The double panel system is established considering both the vibro-acoustic coupling and the effect of the mechanical links between two flexible panels. Firstly, the modal characteristics of the double panel system are analyzed and compared with the results calculated by the finite element method. The accuracy and efficiency of the proposed model have been validated. Subsequently, the forced response of the double panel system under different external excitations is studied. It is shown that the mechanical link resulted in less response level of the double panel system in in low frequency range due to the structural path in the energy transmission of the double panel system. Finally, the effect of the mechanical link parameters on the dynamic performance of the double panel system is discussed. The results reveal that the stiffness coefficients, location distributions, and number of mechanical links can significantly influence the dynamic behavior of the double panel system. Therefore, the theoretical model can be used in optimization techniques to improve the sound transmission characteristics of the double panel system.

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Transmission of Random Sound and Vibration through a Rectangular Double Wall

Cited by 30 publications

References 0 publications

Predicting the sound insulation of finite double-leaf walls with a flexible frame

Predicting the sound insulation of finite double-leaf walls with a flexible frame

Assessment of sound insulation of naturally ventilated double skin facades

Vibro-acoustic coupling analysis of dynamic performance of the double panel system with mechanical links

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