Sound transmission through double leaf lightweight partitions part I: airborne sound

Craik, R.J.M.; Smith, R. Sean

doi:10.1016/s0003-682x(99)00070-5

Cited by 90 publications

(57 citation statements)

References 17 publications

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“…However, when the frequency value exceeds a certain threshold (about 500 Hz), the behaviour of the plate for both types of connections differs. This disagreement for high frequencies coincides with the point raised by Craik et al [10].…”

Section: Discussionsupporting

confidence: 91%

“…Craik and Smith [10] have suggested that line connections are only applicable for low frequencies, or when the connecting screws are sufficiently close together. Fig.…”

Section: Point and Line Connectionsmentioning

confidence: 99%

“…The bases of SEA for dealing with dynamical systems are described by Lyon in [22]. Some SEA models for impact noise can be found in the literature, as the models developed by Craik et al in [11,10,9].…”

Section: Introductionmentioning

confidence: 99%

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A deterministic model of impact noise transmission through structural connections based on modal analysis

Díaz-Cereceda

Hetherington

Poblet-Puig

et al. 2011

Journal of Sound and Vibration

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Vibration transmission through structural connections is modelled in a deterministic way by means of modal analysis. This model is used first to study the effect of elastic joints across the floor in the transmission of impact noise. They are an effective means of reducing impact noise propagation, and can almost eliminate it for small values of the joint stiffness. The method is also used to study the acoustic relevance of studs in lightweight floor transmission. Different ways of modelling the studs are presented and compared. For the examples developed, the best option is to use springs for modelling the studs rather than more complex models involving springs and beams. Also the different behaviour of point and line connections is verified, as well as the influence of the position of the studs.

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Section: Discussionsupporting

confidence: 91%

“…Craik and Smith [10] have suggested that line connections are only applicable for low frequencies, or when the connecting screws are sufficiently close together. Fig.…”

Section: Point and Line Connectionsmentioning

confidence: 99%

See 1 more Smart Citation

A deterministic model of impact noise transmission through structural connections based on modal analysis

Díaz-Cereceda

Hetherington

Poblet-Puig

et al. 2011

Journal of Sound and Vibration

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show abstract

“…The Acousys and FMulay are capable of calcula-tions for more complex lagging structures, whereas Insul is limited to the applications of common building elements (Kurra, 2001;2012;Insul (2017); AcouSYS (2017)). Statistical Energy analysis (SEA) has been also employed by some researchers to predict the sound transmission loss through sandwich panels (Lyon, DeJong, 1995;Crocker et al, 1999;Craik, Smith, 2000;Wang et al, 2010). Thus, it is evident from previous studies that analytical models to a larger extent have filled the gap between the experimentation and theoretical predictions and have thus minimized the necessity of cumbersome and expensive experimentations required in reverberation chambers.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Sound Insulation of Sandwich Partition Panels by Means of Artificial Neural Networks

Garg

Dhruw

Gandhi

2017

Archives of Acoustics

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The paper presents the application of Artificial Neural Networks (ANN) in predicting sound insulation through multi-layered sandwich gypsum partition panels. The objective of the work is to develop an Artificial Neural Network (ANN) model to estimate the Rw and STC value of sandwich gypsum constructions. The experimental results reported by National Research Council, Canada for Gypsum board walls (Halliwell et al., 1998) were utilized to develop the model. A multilayer feed-forward approach comprising of 13 input parameters was developed for predicting the Rw and STC value of sandwich gypsum constructions. The Levenberg-Marquardt optimization technique has been used to update the weights in back-propagation algorithm. The presented approach could be very useful for design and optimization of acoustic performance of new sandwich partition panels providing higher sound insulation. The developed ANN model shows a prediction error of ±3 dB or points with a confidence level higher than 95%.

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“…Craik et al [9] applied the SEA model to predict the sound transmission across double-leaf partitions, accounting for the vibration transmission across structural connections. Recently, Craik and Smith [10] revisited the problem of sound transmission through double-leaf lightweight partitions using a SEA model. In this work, the wall is modelled as a single subsystem at low frequencies, while at higher frequencies the SEA model utilizes a number of interconnected subsystems.…”

Section: Introductionmentioning

confidence: 99%

Analytical evaluation of the acoustic insulation provided by double infinite walls

António

Tadeu

Godinho

2003

Journal of Sound and Vibration

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The acoustic insulation provided by infinite double panel walls, when subjected to spatially sinusoidal line pressure loads, is computed analytically. The methodology used extends earlier work by the authors on the definition of the acoustic insulation conferred by a single panel wall. It does not entail any simplification other than the assumption that the panels are of infinite extent. The full interaction between the fluid (air) and the solid layers is thus taken into account and the calculation does not involve limiting the thickness of any layer, as the Kirchhoff or Mindlin theories require. The problem is first formulated in the frequency domain. Time domain solutions are then obtained by means of inverse Fourier transforms using complex frequencies.The model is first used to compute the sound reduction provided by a double homogeneous brick wall, with identical panels, when illuminated by plane sound waves. The results are then compared with those provided by the simplified method proposed by London, which was later extended by Beranek (LondonBeranek method). The limitations of the simplified London-Beranek model, namely, its applicability only to double walls with identical mass, subjected to plane waves, and its failure to account for the coincidence effect, are overcome by the method proposed.Time signatures are produced to illustrate the different sound transmission mechanisms. Several types of body and guided waves are originated, giving rise to a complex dynamic system with multiple reflections within the solid and fluid layers and the global resonance of the system. The effect of the cavity absorption is considered by attributing a complex density to the air filling the space between the two wall panels. Absorption attenuates the dips of insulation controlled by the cavity resonances. Several simulations are then performed for different combinations of wall and air layer thickness to assess the influence of this variable on the final acoustic insulation. The influence of the air cavity on sound reduction was found to be dependent on the frequency. At low frequencies a better performance was achieved for thicker air layers, while at higher frequencies a thinner air layer is preferable. The use of wall panels with different mass resulted in the wall performing better, particularly for high frequencies. 0022-460X/03/$ -see front matter r

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Sound transmission through double leaf lightweight partitions part I: airborne sound

Cited by 90 publications

References 17 publications

A deterministic model of impact noise transmission through structural connections based on modal analysis

A deterministic model of impact noise transmission through structural connections based on modal analysis

Prediction of Sound Insulation of Sandwich Partition Panels by Means of Artificial Neural Networks

Analytical evaluation of the acoustic insulation provided by double infinite walls

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