Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

Isaac, Chukwuemeke William; Pawełczyk, Marek; Wrona, Stanisław

doi:10.3390/app10041543

Cited by 33 publications

(23 citation statements)

References 153 publications

(186 reference statements)

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“…Various efforts to reduce the sound transmission through the wall are available in the literature [13][14][15]. However, strategies to improve the sound insulation of stud walls through perforated webs are yet to be investigated.…”

Section: Introductionmentioning

confidence: 99%

Perforated Steel Stud to Improve the Acoustic Insulation of Drywall Partitions

Arjunan¹,

Baroutaji²,

Robinson³

2021

Preprint

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Steels studs are an inevitable part of drywall construction as they are lightweight and offer the required structural stability. However, the studs act as sound bridges between the plasterboards reducing the overall sound insulation of the wall. Overcoming this often calls for wider cavity walls and complex stud decoupling fixtures that increase the installation cost while reducing the floor area. As an alternative approach, this research reveals the potential of perforated studs to improve the acoustic insulation of drywall partitions. The acoustic and structural performance is characterized using a validated finite element model that acted as a prediction tool in reducing the number of physical tests required. The results established that an acoustic numerical model featuring fluid-structure-interaction can predict the weighted sound reduction index of a stud wall assembly at an accuracy of ±1 dB. The model was used to analyze six perforated stud designs and found to outperform the sound insulation of non-perforated drywall partitions by reducing the sound bridging. Overall, the best performing perforated stud design was found to offer improvements in acoustic insulation of up to 4 dB, while being structurally compliant.

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Section: Introductionmentioning

confidence: 99%

Perforated Steel Stud to Improve the Acoustic Insulation of Drywall Partitions

Arjunan¹,

Baroutaji²,

Robinson³

2021

Preprint

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“…The TL is defined as the ratio of incident to transmitted sound power. There are a number of methods and publications for calculating the TL of FRP and sandwich structures, which are comprehensively reviewed by D’Alessandro et al [ 19 ] and by Isaac et al [ 20 ]. The studies of Dym and Lang [ 21 ] are of particular interest, as they describe the effects of skin thickness variation (and their ratio) and core stiffness variation in great detail.…”

Section: Introductionmentioning

confidence: 99%

Sound Transmission Loss of a Sandwich Plate with Adjustable Core Layer Thickness

et al. 2020

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Compressible Constrained Layer Damping (CCLD) is a novel, semi-active, lightweight-compatible solution for vibration mitigation based on the well-known constrained layer damping principle. The sandwich-like CCLD set-up consists of a base structure, a constraining plate, and a compressible open-cell foam core in between, enabling the adjustment of the structure’s vibration behaviour by changing the core compression using different actuation pressures. The aim of the contribution is to show to what degree, and in which frequency range the acoustic behaviour can be tuned using CCLD. Therefore, the sound transmission loss (TL), as an important vibro-acoustic index, is determined in an acoustic window test stand at different actuation pressures covering a frequency range from 0.5 to 5 kHz. The different actuation pressures applied cause a variation of the core layer thickness (from 0.9 d0 to 0.3 d0), but the resulting changes of the stiffness and damping of the overall structure have no significant influence on the TL up to approximately 1 kHz for the analysed CCLD design. Between 1 kHz and 5 kHz, however, the TL can be influenced considerably well by the actuation pressure applied, due to a damping-dominated behaviour around the critical frequency.

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“…However, their performance decays at low frequencies mainly due to the mass-air-mass resonance, where, in turn, an active control approach may be applied [ 32 , 33 ]. One of the advantages of a double-panel structure over a single panel is that its sound-absorbing performance can be improved, e.g., by interlayers and absorbing materials [ 34 , 35 ]. To improve structure performance around the mass-air-mass resonance, a mass-spring-damper system may be applied [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Spectral Analysis of Macro-Fiber Composites Measured Vibration of Double-Panel Structure Coupled with Solenoids

Chraponska

Rzepecki

Isaac

et al. 2020

Sensors

Self Cite

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Noise may have a negative impact on humans health and well being. Noise is a direct result of the vibration of structures. Many industrial workers and people using household appliances may be exposed to these harmful factors. To minimize their negative consequences, different approaches to noise and vibration reduction may be applied, e.g., active, semi-active or passive methods. In this research, a semi-active approach to vibration reduction of a cubic rigid casing enclosing a noise- and vibration-generating device is presented. One of the casing walls consists of double thin steel panels, coupled with the use of electromagnetic dampers—solenoids installed in the space between the panels. Other casing walls are built of single plywood panels. Vibrations of the outer (radiating) panel of the wall are measured by Macro-Fiber Composite patches. Spectral analysis of structure vibration is carried out to identify the benefits of the proposed coupling solution in terms of vibration reduction of the wall. The frequency range, where vibration reduction is observed, depends on the number of activated solenoids and the duty cycle of a Pulse Width Modulation (PWM) signal. Advantages and drawbacks of the proposed method are discussed and future improvements of the examined setup are suggested.

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Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

Cited by 33 publications

References 153 publications

Perforated Steel Stud to Improve the Acoustic Insulation of Drywall Partitions

Perforated Steel Stud to Improve the Acoustic Insulation of Drywall Partitions

Sound Transmission Loss of a Sandwich Plate with Adjustable Core Layer Thickness

Spectral Analysis of Macro-Fiber Composites Measured Vibration of Double-Panel Structure Coupled with Solenoids

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