The Influence of Insulating Layers on the Acoustic Performance of Lightweight Frame Floors Intended for Use in Residential Buildings

Nowotny, Łukasz; Nurzyński, J.

doi:10.3390/en13051217

Cited by 12 publications

(6 citation statements)

References 23 publications

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“…Rebound polyurethane foam has comparable or even better parameters of weighted reduction impact sound pressure level than the mineral wool or elasticized Styrofoam commonly used in civil engineering [33,34]. An example comparison of the impact sound reduction ranges is given in Table 7.…”

Section: Discussionmentioning

confidence: 99%

Determination of Vibroacoustic Parameters of Polyurethane Mats for Residential Building Purposes

Nering

Kowalska-Koczwara

2022

Polymers

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This paper is aimed at investigating the use of polyurethane mats, usually used as ballast mats, for residential building purposes. Ballast mats have features that may improve the vibroacoustic comfort in residential rooms. Their strength is certainly an advantage, along with vibration and acoustic insulation. However, the problem that an engineer has to deal with, for example in modeling these types of mats, is a limited knowledge of the material’s vibroacoustic parameters. Knowledge of these may be useful for residential buildings. This paper presents measurements of the vibroacoustic parameters of polyurethane mats, together with a suitable methodology and some results and analysis. The two main material parameters responsible for vibroacoustic protection were measured: the dynamic stiffness, which is related to the acoustic properties of the material, and the critical damping coefficient, which is obviously responsible for damping. The measurement methodology is clearly described. A total of five polyurethane materials with different densities were tested. It was possible to identify a relationship between the material density and the vibroacoustic parameters, which could offer an indication of which material to use, depending on the stimulus affecting a human in a given location.

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Section: Discussionmentioning

confidence: 99%

Determination of Vibroacoustic Parameters of Polyurethane Mats for Residential Building Purposes

Nering

Kowalska-Koczwara

2022

Polymers

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“…The fact that polyurethanes can be recycled materials increases their potential in terms of sustainable development. In residential construction, elastified polystyrene and mineral wool dominate as vibration-insulating materials for floors [ 103 , 104 , 105 , 106 , 107 ], but there is a potential to use rebound polyurethanes because they have appropriate stiffness parameters.…”

Section: Introductionmentioning

confidence: 99%

Alternative Method for Determination of Vibroacoustic Material Parameters for Building Applications

Nering,

Nering

2024

Materials

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The development of urbanization and the resulting expansion of residential and transport infrastructures pose new challenges related to ensuring comfort for city dwellers. The emission of transport vibrations and household noise reduces the quality of life in the city. To counteract this unfavorable phenomenon, vibration isolation is widely used to reduce the propagation of vibrations and noise. A proper selection of vibration isolation is necessary to ensure comfort. This selection can be made based on a deep understanding of the material parameters of the vibration isolation used. This mainly includes dynamic stiffness and damping. This article presents a comparison of the method for testing dynamic stiffness and damping using a single degree of freedom (SDOF) system and the method using image processing, which involves tracking the movement of a free-falling steel ball onto a sample of the tested material. Rubber granules, rubber granules with rubber fibers, and rebound polyurethanes were selected for testing. Strong correlations were found between the relative indentation and dynamic stiffness (at 10–60 MN/m3) and the relative rebound and damping (for 6–12%). Additionally, a very strong relationship was determined between the density and fraction of the critical damping factor/dynamic stiffness. The relative indentation and relative rebound measurement methods can be used as an alternative method to measure the dynamic stiffness and critical damping factor, respectively.

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“…However, strategies to improve the sound insulation of stud walls through perforated webs are yet to be investigated. The most common technique that is currently used is to increase the thickness of the plasterboards, at the expense of reduced floor area and increased cost [17,18]. Furthermore, increasing the overall thickness of building walls in addition to reducing the sound transmitted through structural links will yield the furthest improvement in the overall acoustic rating of the wall.…”

Section: Introductionmentioning

confidence: 99%

Perforated Steel Stud to Improve the Acoustic Insulation of Drywall Partitions

2021

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Steel 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 them 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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The Influence of Insulating Layers on the Acoustic Performance of Lightweight Frame Floors Intended for Use in Residential Buildings

Cited by 12 publications

References 23 publications

Determination of Vibroacoustic Parameters of Polyurethane Mats for Residential Building Purposes

Determination of Vibroacoustic Parameters of Polyurethane Mats for Residential Building Purposes

Alternative Method for Determination of Vibroacoustic Material Parameters for Building Applications

Perforated Steel Stud to Improve the Acoustic Insulation of Drywall Partitions

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