Results 231 to 240 of about 71,665 (253)

Comparison between Sound Reduction Index Measurement Techniques

2002
The Sound Reduction Index of a partition can be measured according to the method described by ISO 140-3. This measurement technique does not make it possible to discern between direct transmission through the partition and transmission through the lateral structures of the rooms.
P. FAUSTI, SECCHI, SIMONE
openaire   +2 more sources

Measurement of the Sound Reduction Index as a Function of the Incidence Angle by Two Different Methods

Building Acoustics, 2006
Generally sound reduction index R is measured for an incident diffuse field, and does not take into account the angular dependency. However, the variation of reduction index with direction of incoming wave can be significant, and it may be necessary to consider the angular influence in acoustical transmission problems, especially when considering ...
Claire Brutel-Vuilmet, Catherine Guigou-Carter, Michel Villot, Philippe Jean   +3 more
openaire   +1 more source

Separation of Resonant and Non-Resonant Components—Part I: Sound Reduction Index

Building Acoustics, 2008
There is much interest in applying EN12354-1 to lightweight buildings elements which may have critical frequencies above the frequency range of interest. The standard requires that only the resonant component of the sound reduction index be used in the predictions and therefore a reliable method of calculating the resonant component is needed for these
Jeffrey Mahn, John Pearse
openaire   +1 more source

The drying process influence on the brick walls sound reduction index: laboratory evaluations and theoretical analysis

The Journal of the Acoustical Society of America, 2008
This paper presents experimental results showing the sound reduction index of different types of brick walls; the analysis was in particular carried out on double walls, single walls, and single walls with external lining. Its main purpose is to find the minimum drying time of the structure necessary to obtain the sound reduction indexes of brick walls
Scrosati C, Scamoni F, Valentini F
openaire   +3 more sources

The effective sound reduction index of a panel subjected to non-diffuse excitation in a disproportionate room

Applied Acoustics, 1994
Abstract Sound reduction indices used in the prediction of noise transmitted through the envelope of industrial buildings are measured using a classically diffuse excitation field. The effect of the non-diffusivity of the sound-field in a typically disproportionate industrial building on the sound reduction index of a panel is examined.
M.A. Rowell, D.J. Oldham, R.J. Orlowski
openaire   +1 more source

Analysis of the extensibility of Sound Reduction Index measurements of windows

2013
Atti dei convegni congiunti dell'associazione italiana di acustica e dell'associazione tedesca di ...
SECCHI, SIMONE, NANNIPIERI, ELISA, E. Stoppioni   +2 more
openaire   +1 more source

COMPARISON BETWEEN LABORATORY AND IN SITU SOUND REDUCTION INDEX MEASUREMENTS

2001
The paper deals with the results of research concerning the acoustical properties of masonry walls tested both in a laboratory with suppressed flanking transmission and in a laboratory with relevant flanking transmission (in situ). Measurements were aimed at evaluating the difference between Sound Reduction Index in laboratory and in situ and the ...
SECCHI, SIMONE, P. FAUSTI
openaire   +1 more source

Analysis of airborne sound reduction index of bare CLT walls

2018
Estimation of the airborne insulation of vertical partitions, evaluated from the performance of basic components according to standardized prediction models, does not provide satisfactory results when applied to walls made of Cross-Laminated Timber (CLT) elements.
Di Bella A., Granzotto N., Quartaruolo G., Speranza A., Morandi F.   +4 more
openaire   +2 more sources

On the uncertainty of sound reduction index measurements from inter-laboratory tests

2018
Test reports of building acoustics measurements cannot be considered complete without declaring the associated uncertainty. Two dominant methods exist for calculating the uncertainty, i.e. the empirical approach, standardized in ISO 5725, and the modelling approach, standardized in ISO/IEC Guide 98-3.
M Garai, C Scrosati, A Pievatolo
openaire   +3 more sources

Pilot study on numerical prediction of sound reduction index of double window system: Comparison of finite element prediction method with measurement

Acoustical Science and Technology, 2022
Takeshi Okuzono, Kimihiro Sakagami
exaly