The transmission loss of double and triple walls

Utley, W.A.; Mulholland, K.A.

doi:10.1016/0003-682x(68)90004-2

Cited by 15 publications

(10 citation statements)

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“…These observations are well supported by Mulholland's [14] work which showed that increasing the depth of the empty cavity from 50 to 100 mm resulted in a 3 dB mean STL increase but no increase when the depth was increased from 100 to 150 mm. This result was similar to Utley and Mulholland's [29] investigation which showed that with different cavity depths between 100 and 200 mm the STL may actually decrease with an increase in depth at particular depths. Further increases in the depth of the cavity at these points then led to an increase in the STL.…”

Section: Size Of the Wall Cavitysupporting

confidence: 90%

The Influence of the Wall Cavity on the Transmission Loss of Wall Systems — Experimental Trends

2013

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Numerous experimental investigations have been conducted into the sound transmission loss of double leaf wall systems. From these investigations, it has been observed that the properties of the wall panels, material placed within the wall cavity as well as the type of wall connections used, greatly influence the sound transmission through the wall system. In all of these cases the wall cavity greatly affects the extent of this influence and in some cases it can even nullify their effect when changes are made. In this paper the influence of the wall cavity based on experimental trends is investigated. The investigation revealed that a wide variety of conclusions were obtained by different researchers concerning the role of the cavity and the properties of any associated sound absorption material on the sound transmission loss through double leaf wall systems. Consequently recommendations about the ways in which sound transmission through cavity systems can be improved should always be qualified with regard to the specific frequency range of interest, type of sound absorption material, wall panel and stud characteristics.

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Section: Size Of the Wall Cavitysupporting

confidence: 90%

The Influence of the Wall Cavity on the Transmission Loss of Wall Systems — Experimental Trends

2013

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“…Fig. 3 shows the measured sound reduction indices for partitions DF(2 + 2), SF(2 + 1)_SF(1) and SF(1 + 1)_SF (2). Again, the results obtained show that the sound reduction indices of the partition with the gypsum board layers on the outer faces, DF(2 + 2), are higher than those of the partitions with internal layer of gypsum board, SF(2 + 1)_SF(1) and SF(1 + 1)_SF(2), for frequencies between 100 and 200 Hz.…”

Section: Resultsmentioning

confidence: 99%

“…Some authors have studied the sound insulation of triple partitions, but most of the previous work refer to triple-glazed windows [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2006

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“…Measurements were carried out according to the criteria suggested in ISO 10848-1. 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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The transmission loss of double and triple walls

Cited by 15 publications

References 1 publication

The Influence of the Wall Cavity on the Transmission Loss of Wall Systems — Experimental Trends

The Influence of the Wall Cavity on the Transmission Loss of Wall Systems — Experimental Trends

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

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

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