Results 21 to 30 of about 329 (216)
Broadband low-frequency sound absorption in open tunnels with deep sub-wavelength Mie resonators
Frontiers in Physics, 2022 We report both experimentally and numerically that near-perfect absorption of low-frequency sound is realized in an open tunnel embedded with two deep sub-wavelength (0.085 λ) Mie resonators. The resonators are composed of a multiple-cavity structure and
Jianping Xia +14 more
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Applied Sciences, 2021 This study aimed to reveal the influence of sound absorption in general dwellings on the subjective evaluation of acoustics. First, a subjective experiment was conducted using a full-scale room model. The results indicate that the feelings of silence and
Kazuma Hoshi +3 more
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The acoustical absorption by air-saturated aerogel powders
The Journal of the Acoustical Society of America, 2022 The acoustical behavior of air-saturated aerogel powders in the audible frequency range is not well understood. It is not clear, for example, which physical processes control the acoustic absorption and/or attenuation in a very light, loose granular mix in which the grain diameter is on the order of a micron.
Begum, H. +3 more
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Frontiers in Physics, 2022 We report the numerical and experimental realization of a type of ultrathin planar wall with low-frequency dual-band sound absorption. The proposed planar wall is constructed by a periodic subwavelength unit cell (with a thickness of λ/19) which consists
Yu-wei Xu +10 more
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Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth
Scientific Reports, 2021 The recent advent of acoustic metamaterials offers unprecedented opportunities for sound controlling in various occasions, whereas it remains a challenge to attain broadband high sound absorption and free air flow simultaneously.
Jiayuan Du +5 more
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Acta AcusticaCalibration of material properties in room acoustics simulations is essential to producing realistic results. However, the number of available algorithms for calibrating room acoustics models remain limited. This work presents two methods for calibrating
Bellows Samuel D., Katz Brian F. G.
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Effective acoustic absorption of ETFE membranes and cushions
Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023, 2022 In this paper, we report on measurements of the acoustic absorption coefficient of ETFE membranes and cushions by two types of measurement approaches. The experimental results are compared with material simulations in ODEON® room acoustics ver.17. The absorption was determined via the assumption that the energy which passes through the foil can be ...
Gharibian Lavasani, Sayyed Majid +5 more
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Influence of the Plaster Physical Structure on Indoor Acoustics
Archives of Acoustics, 2021 The article presents the main results of research on plaster samples with different physical parameters of their structure. The basic physical parameter taken into account in the research is plaster aeration.
Edyta PRĘDKA +2 more
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The Department of Acoustics at the Building Research Institute (ITB): A historical overview
Acta AcusticaThe article presents the development of the Department of Acoustics at the Building Research Institute (ITB) in Poland and its contribution to the evolution of building acoustics in the twentieth and early twenty-first centuries.
Nowicka Elzbieta, Nurzynski Jacek
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Acoustic properties of green walls: Absorption and insulation [PDF]
Proceedings of Meetings on Acoustics, 2016 In the past few decades, the issue of environmental quality in the urban environment is a recurring theme. Green walls and roofs have demonstrated great efficiency in the attenuation of adverse effects such as heat islands. The thermal characterization of these systems are well studied, however few studies have been carried out on their acoustic ...
Rodolfo Thomazelli +2 more
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