Uncertainty analysis by a Round Robin Test of field measurements of sound insulation in buildings: Single numbers and low frequency bands evaluation - Airborne sound insulation

2013 ◽  
Vol 61 (3) ◽  
pp. 291-306 ◽  
Author(s):  
Chiara Scrosati ◽  
Fabio Scamoni ◽  
Maurizio Bassanino ◽  
Mauro Mussin ◽  
Giovanni Zambon
Keyword(s):  
Uncertainty Analysis ◽  
Low Frequency ◽  
Field Measurements ◽  
Round Robin ◽  
Sound Insulation ◽  
Round Robin Test ◽  
Frequency Bands ◽  
Airborne Sound

scholarly journals Uncertainty of facade sound insulation by a Round Robin Test. Evaluations of low-frequency procedure and single numbers

2016 ◽  
Vol 105 ◽  
pp. 253-266 ◽  
Author(s):  
Chiara Scrosati ◽  
Fabio Scamoni ◽  
Andrea Prato ◽  
Simone Secchi ◽  
Patrizio Fausti ◽  
...  
Keyword(s):  
Low Frequency ◽  
Round Robin ◽  
Sound Insulation ◽  
Round Robin Test

Uncertainty of façade sound insulation in buildings by a Round Robin Test

2015 ◽  
Vol 96 ◽  
pp. 27-38 ◽  
Author(s):  
Chiara Scrosati ◽  
Fabio Scamoni ◽  
Giovanni Zambon
Keyword(s):  
Round Robin ◽  
Sound Insulation ◽  
Round Robin Test

Mockup Investigation of Lightweight Timber Floor

2014 ◽  
Vol 899 ◽  
pp. 499-504
Author(s):  
Juraj Medveď ◽  
Bart Ingeleare ◽  
Lieven de Geetere
Keyword(s):  
Low Cost ◽  
Low Frequency ◽  
Sound Insulation ◽  
Light Weight ◽  
Test Results ◽  
Lightweight Construction ◽  
Frequency Bands ◽  
Timber Frame ◽  
Measurement And Analysis ◽  
The Impact

This paper dealt with measurement and analysis of different floor structures and their acoustic optimization towards the improvement of the impact sound insulation. Special attention goes to light weight timber frame constructions with taking in account the low frequency bands. The aim of the research is to create or design acoustic optimized lightweight floor constructions and mainly to find a good solution to achieve the best possible impact sound insulation for lightweight floors with the lowest possible thickness and low cost. Following contribution is first part of mentioned investigation and deal about test results on mockup lightweight construction.

Phononic crystal sandwich for broadband and low frequency acoustic insulation under diffuse field

2021 ◽  
Vol 263 (4) ◽  
pp. 2296-2303
Author(s):  
Natacha Aberkane-Gauthier ◽  
Miguel Moleròn ◽  
Damien Lecoq ◽  
Clément Lagarrigue ◽  
Charles Pézerat ◽  
...  
Keyword(s):  
Transmission Loss ◽  
Phononic Crystal ◽  
Low Frequency ◽  
Core Layer ◽  
Field Measurements ◽  
Wide Frequency Range ◽  
Point Of View ◽  
Sound Insulation ◽  
Acoustic Insulation ◽  
Gap Opening

Light and thin structures exhibiting high sound insulation over a wide frequency range are a major industrial concern, especially in the transport and building sectors. Phononic crystals constitute promising solutions to solve this issue due to their particular dispersion properties. In this work, we build a system consisting of a well-known sandwich panel comprising a soft elastic core layer hosting periodically arranged rigid inclusions. Diffuse field measurements show a huge improvement of the Transmission Loss compared to the system without inclusions. In fact, for this kind of panel, the structured core enables Bragg band-gap opening for guided slow propagating waves leading to low frequency and broadband enhancement of the Transmission Loss. Using a 3cm-thick material we are able to improve the response from 300 Hz on (λ/38 in air). We then develop a finite elements model to achieve a precise description and understanding of the problem. We also propose a numerical tool to analyze the system's band-structures from a vibroacoustic point of view. It proves very useful for the further development of practical solutions.

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.

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