Results 1 to 10 of about 178,722 (144)
Results in EngineeringThis study proposes an underwater coating with sound absorption ability in the middle-to-low frequency range and establishes an acoustic theoretical model combining the equivalent medium theory and the transfer matrix method.
Nansha Gao +3 more
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Broadening sound absorption coefficient with hybrid resonances [PDF]
Applied Acoustics, 2020 Abstract In the last years, a great research effort has been focused on the noise mitigation at low frequencies. Membrane-type acoustic metamaterials (AMM) are one of the most promising solutions to meet the growing demand for low frequency sound absorbers.
Bucciarelli, Fabrizio, Meo, Michele
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Sound-Absorption Coefficient of Bark-Based Insulation Panels [PDF]
Polymers, 2020 The objective of this study was to investigate the sound absorption coefficient of bark-based insulation panels made of softwood barks Spruce (Picea abies (L.) H. Karst.) and Larch (Larix decidua Mill.) by means of impedance tube, with a frequency range between 125 and 4000 Hz.
Eugenia Mariana Tudor +5 more
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Journal of Wood Science, 2021 We investigated the effect of ultrasonic treatment on Malas (Homalium foetidum) gas permeability and sound absorption coefficient using the transfer function method.
Chun-Won Kang +4 more
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Chemical Engineering Journal, 2023 Effective use of sound absorption materials is the main way to reduce noise pollution, which constitutes a major environmental and health problem. However, the currently used porous sound absorption materials cause not only environmental pollution but ...
Yujiao Dong +2 more
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Reverse design of broadband sound absorption structure based on deep learning method
Scientific ReportsThis research presents a method based on deep learning for the reverse design of sound-absorbing structures. Traditional methods require time-consuming individual numerical simulations followed by cumbersome calculations, whereas the deep learning design
Yihong Zhou +3 more
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A new simple method for determining the sound absorption coefficient
MATEC Web of Conferences, 2018 Taking into account the influence of the length and diameter of the impedance tube on the process of decay of sound waves, a new study of sound propagation in an impedance tube is presented, on the basis of which it is easier to determine the sound ...
Chelidze Merab
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Materials, 2022 In this study, the sound absorption properties of randomly packed granular materials were estimated. Generally, it is difficult to construct a general mathematical model for the arrangement of randomly packed granular materials. Therefore, in this study,
Shuichi Sakamoto +3 more
semanticscholar +1 more source
Investigation of the sound absorption properties of gypsum particleboard produced with kenaf stalks and nano clay [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2014 In this study sound absorption coefficient and hardness of gypsum particleboard produced with kenaf stalk and nano clay were investigated. Variables in this study were weight ratio of kenaf stalks to poplar wood in three levels (40, 50 and 60 %) and nano
Hossein Rangavar, Mohammad hassan Payan
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Sound Wave Absorption Coefficient and Sound Velocity in Thermally Modified Wood
Applied Sciences, 2023 The present work analyses the absorption coefficient of sound waves and the speed of sound propagation in thermally modified wood. The high resistance to weathering, fungi, and better dimensional stability, and therefore the broad physical properties of ...
Przemysław Mania +2 more
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