Results 211 to 220 of about 71,665 (253)
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Sound intensity and sound reduction index
Applied Acoustics, 1993Abstract The sound intensity technique has been tested on sound insulation measurements under laboratory conditions. A detailed measurement and evaluation procedure is proposed. About 30 different measurements have been carried out in three different laboratories to estimate the precision of this intensity method when compared with the traditional ...
exaly +2 more sources
Theoretical Determination of Sound Reduction Index of Simple Walls on Various Material Bases
Applied Mechanics and Materials, 2016The contribution deals with a comparison of measured and calculated values of sound reduction index R (dB) and weighted sound reduction index Rw (dB) of simple walls from various materials. In this way it verifies the exactness of a modified calculation-graphic method according to Watters and an appropriateness of its application for simple walls from ...
Rastislav Mendan
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Building Acoustics, 2019
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.
AM Shehap +2 more
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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.
AM Shehap +2 more
exaly +2 more sources
Applied Acoustics, 2016
Abstract Precast panels are widely used for the construction of large industrial buildings, trade centres and apartment houses. These buildings have to comply with prescribed noise and thermal requirements, so the possibility to accurately estimate the sound reduction index of such panels is of vital importance.
Edoardo Alessio Piana
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Abstract Precast panels are widely used for the construction of large industrial buildings, trade centres and apartment houses. These buildings have to comply with prescribed noise and thermal requirements, so the possibility to accurately estimate the sound reduction index of such panels is of vital importance.
Edoardo Alessio Piana
exaly +3 more sources
Effect of size on measurements of the sound reduction index of a window or a pane
Applied Acoustics, 1983Abstract The variation in the sound reduction index as a function of the size of a test specimen was investigated. Five different sizes of one particular hinged window were tested. In addition, tests were carried out with a sound insulating double glazing and a laminated pane mounted in normal wooden frames.
exaly +2 more sources
Prediction of the sound reduction index with the modal theory
The Journal of the Acoustical Society of America, 2004A procedure of sound reduction index calculation was developed on the basis of the modal theory. This calculation uses the study of the vibratory behavior and of the radiation of the plate. The vibratory study makes it possible to characterize the displacement of the wall. The latter is developed over a base: sinusoidal or polynomial.
Alain Tisseyre +3 more
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A modal approach to the prediction of the sound reduction index
The Journal of the Acoustical Society of America, 2003The calculation of the sound reduction index in modal analysis is presented in a general way; different possible approaches are described. These calculations are done in two steps: a vibratory study to determine the transverse displacement of the plate and a study of radiation. The specificity of orthotropic plates is presented.
Alain Tisseyre +3 more
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Prediction of the sound reduction index of clay hollow brick walls
Building Acoustics, 2020Clay hollow brick walls are still popular in building industry, but the prediction of their sound insulation properties is not straightforward due to their inhomogeneous and anisotropic characteristics. In this article, a classic approach has been used to determine the sound transmission coefficient of brick walls, assuming an orthotropic behaviour and
Nicola Granzotto +2 more
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Comparison of different methods to determine the sound reduction index R of walls
INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 2023The laboratory method (ISO 10140-2:2021) is probably the most accurate method to determine the sound reduction index R of walls. Flanking noise (ISO 10848-1 and 4:2017) is almost fully eliminated in the laboratory setup whereas this is not the case for in situ measurements (ISO 10052:2021).
Filip Verbandt +2 more
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Influence of screw spacings on sound reduction index in lightweight partitions
Applied Acoustics, 2002Abstract In this paper measured sound reduction index data for lightweight partitions with gypsum board layers attached to the frame with two different screw spacings are presented. Data are used to show the effect of screw spacings and to quantify the effect on sound reduction index.
Antonio Uris +4 more
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