Sound insulation of double frame partitions with an internal gypsum board layer

Rubio, Constanza; Bravo, José María; Gomez-Lozano, Vicente; Ramı́rez, Patricio; Lull, Cristina

doi:10.1016/j.apacoust.2005.11.006

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…The results of research conducted by Uris in 2006 [15] have shown the sound reduction index for frequencies at and below the resonant frequency (about 170 Hz) is reduced by adding a gypsum board layer in the middle of a double frame partition since the inner layer decreases the depth of the cavity partition and then the triple leaf partition works like a single leaf partition with a mass equal to the sum of a single leaf mass. In most situations, the weighted sound reduction index is regulated by the 100-200 Hz band, since the introduction of the gypsum board layer in the center of the double frame causes a significant decrease in the weighted sound reduction index, which can be as high as 7-8 dB, the insertion of the gypsum board layer in the center of the double frame causes a noticeable decrease in the weighted sound reduction index, which can be as high as 7-8 dB.…”

Section: Resultsmentioning

confidence: 99%

“…and is the output (transmissivity) and input (incident) sound pressure. This can be illustrated in Figure 3, where the symbol T in the picture is a matrix transfer function in a structure in Equation ( 12): (12) Pressure in Equation ( 13) and velocity in Equation ( 14) on the input side as well as pressure in Equation (15) and speed in Equation ( 16) on the output side are written as is Express the pressure and speed variables on the output side, so Equation ( 18) can be changed to: (19) After reducing the incident pressure (pi), the next step is to enter Equation ( 19) into the transmission factor Equation ( 11), so that the equation can be changed to Equation ( 20):…”

Section: Literature Reviewsmentioning

confidence: 99%

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Soundproofing Wall: A Review

2020

IJETER

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This review paper will explain some of the results of research on the development of soundproofing wall technology. It was starting from the single-layer, double-layers, triple-layers soundproofing walls to have a sandwich structure. Sound Transmission Loss (STL) and Sound Absorption Coefficient (SAC) are the two biggest acoustic problems that must be solved in designing soundproofing walls. The selection of the right material and modifications that can be made possible to improve the performance of the soundproofing wall need to be done to overcome this problem, for example, flax fiber material which has a sound reduction efficiency of 21.2% with a thickness of 1 cm. Apart from the choice of sound attenuation, modifications to the soundproofing wall need to be done to improve the performance of the material for example, wooden triple glazed window can reduce sound transmission (STL) by 36 dB. Therefore, research on the type of material that has good acoustic properties and the right type of modification to be used in the soundproofing wall cannot be separated to create an optimal soundproofing wall.

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Section: Resultsmentioning

confidence: 99%

Section: Literature Reviewsmentioning

confidence: 99%

Soundproofing Wall: A Review

2020

IJETER

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“…Calculation of Acoustic Reduction Index. In noise control technology, the transmission coefficient τ is usually used to express the acoustic insulation property, but the transmission coefficient is usually very small [8][9][10]. In order to perform calculations more conveniently, the acoustic insulation property of a material is usually expressed by the acoustic reduction index (R), which has a unit of dB and is shown in the following formula:…”

Section: Resultsmentioning

confidence: 99%

Acoustic Insulation Property of V-Structure Glass Fabric Reinforced PVC Composites

Wang

Zhu

2013

AMM

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In this paper, four models of PVC composites reinforced with glass fabric were designed based on the arrangement of the V-structure, using V-structure discontinuous glass fabric as the sandwich structure and PVC resin as matrix. The acoustic insulation properties of the composites with V-structure discontinuous glass fabric as the sandwich structure were analyzed with a two-channel acoustic analyzer. The results show that the orientation of the V-structure has a strong effect on the acoustic insulation property. In the case where the raw material, thickness and density of the V-PVC composites are almost the same, the composite with the opening of the V-structure toward the source of sound shows better acoustic insulation than that with the opening of the V-structure away from the sound source. This difference is even more pronounced with increasing layers of glass fabric.

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“…Jose laboratoriniais matavimais įrodoma, kaip daugiasluoksnėmis konstrukcijomis galima pasiekti oro garso izoliavimo rodiklio vertes, didesnes kaip 60 dB. Atliktais eksperimentais parodoma (Uris et al 2006), kad subalansuotos lengvasvorės konstrukcijos viduje naudojant papildomą lakštinį sluoksnį (gipskartonio plokštę) pasireiškia žemojo dažnio rezonansai, 7 dB mažinantys oro garso izoliavimo rodiklio vertę. Į šį faktą būtina atsižvelgti, nes šiame darbe tiriamas būtent pagrindinių konstrukcijų garso izoliavimo pagerėjimas dėl dangos su papildomais lakštinių medžiagų sluoksniais.…”

Section: Daugiasluoksnių Konstrukcijų Ore Sklindančio Garso Izoliavimunclassified

Mūrinių Konstrukcijų Garso Izoliavimas Papildomais Lanksčiais Sluoksniais

Mickaitis

Jagniatinskis

Fiks

2011

Statybinės Konstrukcijos ir Technologijos

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For the purposes of accumulating knowledge of how to comply with requirements for new buildings of obligatory sound class C or enhanced acoustic comfort sound classes A and B (Lithuanian Building Technical regulations STR 2.01.07:2003), the article discusses improvement on airborne sound insulation of partitions between dwellings using additional plasterboard layers. The results of an empirical approach were obtained performing in situ measurements of the partitions of masonry from silicate blocks and expanded-clay concrete blocks. Theoretical calculations without the evaluation of flanking paths are added. The paper looks at the peculiarities of in situ measurement methods and the estimation of the limiting uncertainty of the sound reduction index. It is showed that the values of the in situ measurements of the airborne sound reduction index in accordance with requirements EN ISO 140 and EN ISO 717 series for rooms having volume higher than 50 m3 varies depending on frequency range. It has been stated, that improvement on the weighed airborne sound reduction index in the frequency range from 100 Hz to 3150 Hz depends on the properties of additional layers and on the characteristics of the main constructions. Resonance in the low frequency range arising due to additional layers may reduce the weighed airborne sound reduction index defined in the frequency range from 50 Hz to 3150 Hz. This fact must be taken into account when designing improvement on masonry wall insulation using an additional layer in dwellings.

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Sound insulation of double frame partitions with an internal gypsum board layer

Cited by 6 publications

References 7 publications

Soundproofing Wall: A Review

Soundproofing Wall: A Review

Acoustic Insulation Property of V-Structure Glass Fabric Reinforced PVC Composites

Mūrinių Konstrukcijų Garso Izoliavimas Papildomais Lanksčiais Sluoksniais

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