Measurement of the Vibration Reduction Index, Kijon Free-Standing Masonry Wall Constructions

1999 ◽  
Vol 6 (3) ◽  
pp. 235-257 ◽  
Author(s):  
C. Hopkins
Keyword(s):  
Vibration Reduction ◽  
Masonry Wall ◽  
Free Standing ◽  
Reduction Index

In situ evaluation of the vibration reduction index Kij

2008 ◽  
Vol 123 (5) ◽  
pp. 3615-3615
Author(s):  
Arianna Astolfi ◽  
Alessandro Schiavi ◽  
Cristiana Taricco ◽  
Simone Geroso ◽  
Fabrizio Bronuzzi ◽  
...  
Keyword(s):  
Vibration Reduction ◽  
Reduction Index

The Vibration Reduction Index Kij: Laboratory Measurements for Rigid Junctions and for Junctions with Flexible Interlayers

2006 ◽  
Vol 13 (2) ◽  
pp. 99-111 ◽  
Author(s):  
Charlotte Crispin ◽  
Bart Ingelaere ◽  
Manuel Van Damme ◽  
Debby Wuyts
Keyword(s):  
Vibration Reduction ◽  
Laboratory Measurements ◽  
Reduction Index

Vibration Reduction Index of a T-Junction With a Flexible Interlayer

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
J. Alba ◽  
E. Escuder ◽  
J. Ramis ◽  
R. Del Rey ◽  
E.G. Segovia
Keyword(s):  
Near Field ◽  
Vibration Reduction ◽  
Scale Model ◽  
Reliable Prediction ◽  
The Cost ◽  
Elastic Layers ◽  
Sound Reduction ◽  
Predictive Formulas ◽  
Expression Of Uncertainty ◽  
Reduction Index

This paper describes the procedure followed to evaluate the vibration reduction index for T-junctions with inserted flexible elements and proposes new equations to complement the standard EN 12354-1:2000. The experiment described in this work is based on a 1:3 scale model of a T-junction with a flexible interlayer. It was used to obtain a significant reduction in the cost of the configurations under study. We chose to carry out vibration measurements by near-field acoustic holography (NAH) in order to avoid the risk of accelerometer interference. Flanking transmission was determined for different elastic layers with the objective of quantifying the effect of the flexible interlayer and to compare the results obtained with predictive formulas. The results enabled us to propose new equations to complement EN 12354-1:2000 for the reliable prediction of the apparent sound reduction index. The uncertainty associated with the different average velocity levels is determined according to the Guide for the Expression of Uncertainty of Measurement (GUM).

scholarly journals AIRBORNE SOUND INSULATION IMPROVEMENT ON MASONRY PARTITIONS USING ADDITIONAL PLASTERBOARD LAYERS

2011 ◽  
Vol 3 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Marius Mickaitis ◽  
Aleksandras Jagniatinskis ◽  
Boris Fiks
Keyword(s):  
Theoretical Calculations ◽  
Low Frequency ◽  
Masonry Wall ◽  
In Situ Measurements ◽  
Sound Insulation ◽  
Frequency Range ◽  
Airborne Sound ◽  
Sound Reduction ◽  
Reduction Index

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.

scholarly journals Numerical Evaluation of the Vibration Reduction Index for Structural Joints

2012 ◽  
Vol 37 (2) ◽  
Author(s):  
Jaime Ramis ◽  
Enrique Segovia ◽  
Jesús Alba ◽  
Jesús Carbajo ◽  
Luís Godinho
Keyword(s):  
Numerical Evaluation ◽  
Vibration Reduction ◽  
Structural Joints ◽  
Reduction Index

Sound insulation of a hollow concrete blocks wall made with construction and demolition waste and wood-based panels as linings

2021 ◽  
pp. 1351010X2199364
Author(s):  
Rodrigo Scoczynski Ribeiro ◽  
Raylton Pereira de Sousa ◽  
Rosemara Santos Deniz Amarilla ◽  
Luis Henrique Sant’Ana ◽  
Márcio Avelar ◽  
...  
Keyword(s):  
Masonry Wall ◽  
Construction And Demolition Waste ◽  
Index Formula ◽  
Sound Insulation ◽  
Demolition Waste ◽  
Hygroscopic Properties ◽  
Construction Techniques ◽  
Concrete Blocks ◽  
Sound Reduction ◽  
Reduction Index

It is a well-discussed topic that Construction and Demolition Waste (CDW) can be recycled and used as aggregate in the construction sector. Generally, Brazilian construction techniques are based on hollow blocks or bricks and mortars as coating systems. This paper describes the sound insulation of a masonry wall built with hollow concrete blocks and CDW as aggregates. The measurements were performed according to the reverberant chamber method. Keeping sustainability in mind instead of applying cement mortar as coating system, Oriented Strand Boards (OSB) and Wood-Wool Cement Boards (WWCB) were used and also tested as acoustical linings. The panels were directly attached on the wall with nails in the receiving room. All types of panels increased the weighted sound reduction index ([Formula: see text]). Wood-based composites can also improve the air quality because of their hygroscopic properties. In summary, sustainable wall systems were characterized according to their sound insulation properties, presented as possible substitutes for traditional masonry walls.

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