Results 11 to 20 of about 314,481 (350)
Applied Sciences, 2022 Composite structures can be designed with specific parameters for efficient sound absorption in specific frequency bands; however, determining the optimal parameters and topology to maximize sound absorption is a computationally challenging task. In this
Junzhe Zhang +3 more
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ACOUSTICAL PROPERTIES OF WOOD IN 2000, 4000 AND 8000 IN HERTZ FERQUENCIES [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2001 In this research solid wood properties of sound absorption coefficient in over frequency were investigated. Sound absorption at 2000, 4000 and 8000 in Hertz Frequencies was measured on the influence of effective factors in solid wood. Solid wood variable
Amir Nourbakhsh +3 more
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A numerical study of a method for measuring the effective in situ sound absorption coefficient [PDF]
, 2012 The accuracy of a method [Wijnant et al., “Development and applica- tion of a new method for the in-situ measurement of sound absorption”, ISMA 31, Leuven, Belgium (2010).], for measurement of the effective area-averaged in situ sound absorption ...
André de Boer +4 more
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The Absorption of Sound in Gases [PDF]
Science, 1935 Several investigators have shown recently that if the changes in the internal energy of a gas take place so slowly that they cannot follow the adiabatic changes which result when a sound wave passes through the gas, sound dispersion and anomalous absorption of observable magnitudes occur.
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Sound absorption by clamped poroelastic plates [PDF]
, 2008 Measurements and predictions have been made of the absorption coefficient and the surface acoustic impedance of poroelastic plates clamped in a large impedance tube and separated from the rigid termination by an air gap.
Attenborough K. +4 more
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Journal of Materials Research and Technology, 2023 The sandwich structure based on Triply periodic minimal surface (TPMS) is a lightweight and high-strength multifunctional composite material that combines the versatility of heat exchange, impact resistance, and energy absorption, and has been widely ...
Pengfei Zhang +8 more
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A review on polymer-based materials for underwater sound absorption
Polymer Testing, 2021 Greater demands for underwater sound absorption materials have been growing due to the concern about underwater noise control in water. Among the range of existing materials, polymer-based materials are increasingly being utilized as underwater sound ...
Yifeng Fu +3 more
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Absorption of Sound by a Strip of Absorptive Material in a Diffuse Sound Field
The Journal of the Acoustical Society of America, 1959 The random incidence sound absorption coefficient is calculated for a narrow strip of absorbing material set in an otherwise reflecting plane. The assumptions made are that the material is of the locally reacting type, with a real normal admittance. The effect of an imaginary component of admittance is discussed qualitatively.
Northwood, T. D. +2 more
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e-Polymers, 2020 Porous material (PM) shows good sound absorption performance, however, the sound absorbing property of PM with different parameters are greatly different.
Wang Yonghua +5 more
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Development of biodegradable composite micro-perforated panel made from natural fibre composites with evaluation of its acoustic and mechanical properties [PDF]
, 2020 Micro-perforated panel (MPP) has been widely considered as a promising alternative for sound absorption purposes. Plenty of research has been done to improve the sound absorption of MPP but no specific work highlights the material structure effect ...
Chin, Desmond Daniel Vui Sheng
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