The use of absorbent material in double-leaf wall constructions

Utley, W.A.; Cummings, A.; Parbrook, H.D.

doi:10.1016/0022-460x(69)90266-1

Cited by 12 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They are well-known and widely used as absorbents in health care, agriculture applications, cleaning equipment as well as wall materials within building. 47 As one of the generally used absorbent materials, cellulose exhibits high swelling capacity in water. Herein, the equatorial positions of the hydroxyls on the cellulose chain make a large contribution, causing the chains to group together in highly ordered structures.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of natural cellulose substance derived hierarchical polymeric materials

Huang

2009

J. Mater. Chem.

View full text Add to dashboard Cite

Hierarchical porous metal oxide/polymer hybrid and polymer materials were fabricated by replication of natural cellulosic substances and successive removal of the template cellulose components using a solution dissolving method under mild conditions. Commercial filter paper was employed as the template, metal oxide/polymer (titania/polyvinyl alcohol) composite ultrathin films were deposited by layer-by-layer assembly to replicate its structures with nanometer precisions, and the cellulose components were thereafter removed by treating with sodium hydroxide/urea solution. The resulting hierarchical porous titania/PVA composite sheets possessed the initial structures and morphologies of the template cellulosic substance, and also inherited the corresponding physical properties such as flexibility and swelling property in various solvents. Pure hierarchical PVA material was successively obtained by removing the titania component from the titania/PVA hybrid sheets with acidic treatment. The current research breaks the limitation caused by calcination employed in general template syntheses to burn off the template component, opening a pathway for the design and preparation of bio-inspired polymeric and organic materials.

show abstract

Section: Resultsmentioning

confidence: 99%

Fabrication of natural cellulose substance derived hierarchical polymeric materials

Huang

2009

J. Mater. Chem.

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

“…When noise is incident to a DLW, the sound energy is completely transmitted through the DLW because of the mass-air-mass resonance. There have already been some researches [1][2][3][4][5][6][7] on the use of an absorbent material, resonator or other structures to solve this resonance problem. According to the literatures, applying an absorbent material in a DLW can improve the sound insulation performance at mid-and high-frequency bands [1,2].…”

Section: Introductionmentioning

confidence: 99%

Improvement of sound transmission loss of double-layer wall by using vibration absorber

Lin

Tsujimura

Yokoyama

et al. 2014

Acoust. Sci. & Tech.

View full text Add to dashboard Cite

The use of absorbent material in double-leaf wall constructions

Cited by 12 publications

References 8 publications

Fabrication of natural cellulose substance derived hierarchical polymeric materials

Fabrication of natural cellulose substance derived hierarchical polymeric materials

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

Improvement of sound transmission loss of double-layer wall by using vibration absorber

Contact Info

Product

Resources

About