Results 51 to 60 of about 1,550,252 (358)
Acoustical properties of double porosity granular materials [PDF]
, 2011 Granular materials have been conventionally used for acoustic treatment due to their sound absorptive and sound insulating properties. An emerging field is the study of the acoustical properties of multiscale porous materials.
Umnova, O, Venegas, R
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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
doaj +1 more source
Active diffusers : some prototypes and 2D measurements [PDF]
, 2005 Diffusing devices are used to improve room acoustics in a wide variety of applications. The dispersion generated by current diffuser technologies is often limited to mid-to-high frequencies because low-frequency diffusers are usually too large to be ...
Avis, MR, Cox, TJ, Xiao, L
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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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Applied Sciences, 2022 The performance of opera and the post-pandemic slow recovery of the public, who have been hesitant to return to frequent attendance of cultural venues, has inspired the authors to analyze the acoustic behavior of the National Theater of Zagreb, by ...
L. Tronchin, A. Bevilacqua
semanticscholar +1 more source
Rainbow reflection and broadband energy absorption of water waves by graded arrays of vertical barriers [PDF]
Journal of Fluid Mechanics, 2021 The rainbow reflection effect describes the broadband spatial separation of wave spectral components caused by a spatially graded array of resonators. Although mainly studied in optics and acoustics, this phenomenon has recently been demonstrated both ...
Ben Wilks, F. Montiel, S. Wakes
semanticscholar +1 more source
Cellulose-based Material for Sound Absorption And Its Application – A Short Review [PDF]
BIO Web of Conferences, 2023 Cellulose is a natural fiber potentially used as a sound absorber material due to its excellent properties, biodegradability, and lower environmental impact than synthetic materials and can be sourced from various plant-based materials, such as wood ...
Muchlisinalahuddin +3 more
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Predicting theater chair absorption from reverberation chamber measurements - comment [PDF]
, 1993 The relationship between the measured acoustic absorption coefficient of an array of theater chairs and the ratio of the perimeter length to plan area of the array is considered.
Davies, WJ, Lam, YW, Orlowski, RJ
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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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Characteristic qualities affecting landed house prices [PDF]
, 2018 The research was conducted to find the characteristics quality of houses in Malaysia. The aim of this research was to produce the ranking characteristics of house qualities and determining its weightages.
Ahmad Saleh, Ahmad Fawwaz +3 more
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