Results 51 to 60 of about 194,541 (227)
Measurement and prediction of sound absorption of room surfaces and contents at low frequencies [PDF]
, 2002 Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Mecânica.Na área de transmissão sonora em edificações, uma recente ênfase tem sido dada ao estudo de freqüências audíveis, abaixo de ...
Melo, Gustavo da Silva Vieira de
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, 2022 The paper presents the research on the influence of airflow resistance on the sound absorption coefficient of layered porous structures. For the calculation of the sound absorption coefficient, the models of layered sound-absorbing structures were ...
Flach, Artur
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Jurnal Rekayasa Kimia & Lingkungan, 2009 The probability of application of palm fibre from arenga pinnata appear as best treatment for sound absorption material which can be used in controlling noise.
Zulfian Zulfian, Muhammad Sajidin
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Study of the Sound Absorption Performance of Ethylene-Vinyl Acetate Foam Materials
Medžiagotyra, 2019 Ethylene-Vinyl Acetate (EVA) polymer foam was prepared using a mold for this investigation. The effect of the cell structure parameters and pore filling gas type on the sound absorption performance of the EVA foam materials were analyzed in terms of ...
Wei GONG +5 more
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Measurement of Sound Absorption Coefficients with Acoustic Pulses [PDF]
The Journal of the Acoustical Society of America, 1957 Sound absorption coefficients of acoustical materials are commonly measured by the reverberation chamber technique, thereby requiring knowledge of the characteristics of the chamber. Use of acoustic pulses allows determination of reflection coefficients and absorption coefficients without the use of a special chamber, since the pulse reflected from the
R. E. Anderson, R. B. Watson
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Incertezas na medição das características acústicas dos materiais [PDF]
, 2007 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Engenharia MecânicaSeja em aeronaves, automóveis ou ambiente de trabalho, uma das principais ferramentas para o controle de ruído são os ...
Giesbrecht, Peter Klitzke
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Effect of physical properties of natural fibre on the sound absorption coefficient
, 2017 The aim of the study was to analyse the effect of physical properties of natural fibre to the sound absorption coefficient. It was also aimed to study the relation of the physical properties of natural fibre to wider the frequency range and increase the ...
N. H. Zunaidi, W. Tan, M. Majid, E. Lim
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ModellingThis study aims to establish a simple theoretical method for estimating the sound absorption characteristics of randomly packed granular materials. Using insights gained from existing mathematical models for regular packing and methods utilizing CT ...
Shuichi Sakamoto +4 more
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Theoretical and Applied Mechanics Letters, 2016 We present a design method for calculating and optimizing sound absorption coefficient of multi-layered porous fibrous metals (PFM) in the low frequency range.
Wenjiong Chen +3 more
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پزشکی بالینی ابن سینا, 2008 Introduction & Objective: Noise is one of the most important harmful agents in work environment. In spit of industrial improvements, exposure with over permissible limit of noise is counted as one of the health complication of workers.
Rostam Golmohammadi +3 more
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