Influence of air layers and damping layers between gypsum boards on sound transmission

Bravo, José María; Sinisterra, Jaime; Rubio, Constanza; Lull, Cristina; Estelles, Hermelando

doi:10.1016/s0003-682x(02)00028-2

Cited by 13 publications

(8 citation statements)

References 5 publications

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“…Several works have been established to solve this problem. This includes employing absorptive materials inside the gap of a double-leaf, for example, fiberglass [2] and rockwool [3] which can effectively increase the STL due to additional damping to the air layer provided by the absorbent. Mao and Pietrzko [4] proposed a technique by installing the Helmholtz resonators at the air gap.…”

Section: Introductionmentioning

confidence: 99%

“…However, use of acoustic absorbers such as foam or fibrous type materials inside a double-panel is still the most cheapest and common practice to increase the sound insulation performance [2,3]. For noise control application where abrasive and polluting materials cannot be presented, such as in the food industry where hygienic condition is critical to be maintained around the processing machines, conventional synthetic fibrous materials are thus not the solution.…”

Section: Introductionmentioning

confidence: 99%

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Normal Incidence of Sound Transmission Loss of a Double-Leaf Partition Inserted with a Microperforated Panel

Putra

Ismail

Ramlan

et al. 2013

Advances in Acoustics and Vibration

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A double-leaf partition in engineering structures has been widely applied for its advantages, that is, in terms of its mechanical strength as well as its lightweight property. In noise control, the double-leaf also serves as an effective noise barrier. Unfortunately at low frequency, the sound transmission loss reduces significantly due to the coupling between the panels and the air between them. This paper studies the effect of a microperforated panel (MPP) inserted inside a double-leaf partition on the sound transmission loss performance of the system. The MPP insertion is proposed to provide a hygienic double-leaf noise insulator replacing the classical abrasive porous materials between the panels. It is found that the transmission loss improves at the troublesome mass-air-mass resonant frequency if the MPP is located closer to the solid panel. The mathematical model is derived for normal incidence of acoustic loading.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Normal Incidence of Sound Transmission Loss of a Double-Leaf Partition Inserted with a Microperforated Panel

Putra

Ismail

Ramlan

et al. 2013

Advances in Acoustics and Vibration

View full text Add to dashboard Cite

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“…Vibration meter type B&K 2511 is an instrument that is used in conjunction with an accelerometer type 9 London, 10 Ford et al, 11 Utley and colleagues 12,13 and Loney 14 1949,1950,1967, 1968,1969, and 1971 They have studied the effect of cavity absorption on the STL of double-leaf partitions. It was found that the relation between the increase of STL as a function of the amount of absorbing material wasn't linear, where the first inch of the absorbing material had the greatest effect on the STL and the position of the absorbent within the cavity was not very important Mulholland 15 1971 Studied the effect of the cavity size on the sound transmission loss and concluded that increasing the cavity depth may lead to increase in the STL for the empty cavity especially at low frequencies, while a small increase in STL occurs with increasing the cavity size when sound absorption material is present Bravo et al 16 2002…”

Section: Vibration Measurements (V)mentioning

confidence: 99%

Using sound pressure level and vibration velocity method to determine sound reduction index of lightweight partitions

2019

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Nowadays, lightweight building structures are widely used by the construction industry as a more natural and cost-effective method. The purpose of this study is to compare between sound pressure level and vibration velocity method for sound reduction index determination for single-and double-leaf gypsum board partitions. The sound pressure level method was carried out according to the requirements of ISO 140-3:1997, and the vibration velocity method (V) was carried out according to some criteria of ISO 10848-1:2006. Regarding double-leaf partitions, measurements were carried out with the leaves separated by 5-and 10-cm air gaps. The effect of cavity filling with absorbing materials was studied experimentally. The space between the leaves was filled with Rockwool and polyurethane to illustrate the effect of cavity absorption on the sound reduction index behavior. It was found that there is good agreement between the two methods. Also, cavity filling with a 10-cm absorbing material such as Rockwool increases the sound reduction index at the critical frequency by 7 dB using sound pressure method and 4 dB using vibration velocity method.

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“…Some other significant works from NRC were by Nightingale et al 14 on factors affecting sound insulation of gypsum board walls, such as electrical outlet boxes, on framing details 15 and by Bradley and Birta 16 on resilient supports. The influence of air layers and damping layers between gypsum boards was evaluated by Bravo et al 17 The effect of mineral wool density of gypsum double walls was investigated by Uris et al 18 Matsumoto et al 19 researched on the development of lightweight gypsum drywalls with high sound insulation performance. Uris et al 20 studied the effect of additional perforated boards on single-frame double-layer gypsum board partitions.…”

Section: Introductionmentioning

confidence: 99%

Retrofitting masonry and cavity brick façades for different noise zones using laboratory measurements

Demirkale

Aşcıgil-Dincer

2017

Building Acoustics

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Façade airborne sound insulation is crucial for protection of indoor environment from environmental noise. In Turkey, sound insulation in new buildings is bound by law, but 6 million pre-1980 dwellings with thin brick walls and single-glazed windows used in highly transparent façades should be retrofitted. In this study, sound reduction index of masonry and cavity exterior walls which consist of brick, mortar, gypsum board and mineral wool and of common window types is measured in sound insulation test rooms. The study compares and evaluates the effects of plaster, brick thickness, cavity depth, mineral wool thickness and mineral wool placement on sound reduction index values, using traditional materials and building techniques. Traditional brick wall façades and possible retrofitting of these façades are evaluated for sound insulation of bedrooms and living rooms in different noise zones, 55, 60, 65, 70 and 75 dBA, with various transparency ratios, 0%, 30%, 40%, 50% and 70%. The analysis shows that window types and single-layer walls are the deterministic factors in evaluating sound insulation in retrofitting projects and that it is not possible to provide proper aural comfort in high noise zones.

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Influence of air layers and damping layers between gypsum boards on sound transmission

Cited by 13 publications

References 5 publications

Normal Incidence of Sound Transmission Loss of a Double-Leaf Partition Inserted with a Microperforated Panel

Normal Incidence of Sound Transmission Loss of a Double-Leaf Partition Inserted with a Microperforated Panel

Using sound pressure level and vibration velocity method to determine sound reduction index of lightweight partitions

Retrofitting masonry and cavity brick façades for different noise zones using laboratory measurements

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