Results 11 to 20 of about 60,794 (221)
Reverberation Time Control by Acoustic Metamaterials in a Small Room [PDF]
Building and Environment 244 (2023): 110753, 2023 In recent years, metamaterials have gained considerable attention as a promising material technology due to their unique properties and customizable design, distinguishing them from traditional materials. This article delves into the value of acoustic metamaterials in room acoustics, particularly in small room acoustics that poses specific challenges ...
arxiv +1 more source
Low-Frequency Broadband Acoustic Metasurface Absorbing Panels
Frontiers in Mechanical Engineering, 2020 A broadband sound absorption attained by a deep-subwavelength structure is of great interest to the noise control community especially for extremely low frequencies (20–100 Hz) in room acoustics.
Jun Ji +4 more
doaj +1 more source
Perfect Absorption in Mirror-Symmetric Acoustic Metascreens [PDF]
Physical Review Applied, 2020 Mirror-symmetric acoustic metascreens producing perfect absorption independently of the incidence side are theoretically and experimentally reported in this work. The mirror-symmetric resonant building blocks of the metascreen support symmetric and antisymmetric resonances that can be tuned to be at the same frequency (degenerate resonances).
V. Romero-García +7 more
openaire +6 more sources
Study and Improvement of Acoustic Conditions in Public Spaces of Shopping Malls
Acoustics, 2021 Acoustic comfort in shopping malls is one of the aspects that influence the shopping environment. Making enjoyable and comfortable retail and public spaces is demanded when designing and managing properties.
Nikolay Kanev
doaj +1 more source
Nonlinear acoustic and microwave absorption in glasses [PDF]
Physical Review B, 1997 A theory of weakly-nonlinear low-temperature relaxational absorption of acoustic and electromagnetic waves in dielectric and metallic glasses is developed. Basing upon the model of two-level tunneling systems we show that the nonlinear contribution to the absorption can be anomalously large.
Martin Kirkengen, Yu. M. Galperin
openaire +3 more sources
Research Progress on Sound Absorption of Electrospun Fibrous Composite Materials
Nanomaterials, 2022 Noise is considered severe environmental pollutant that affects human health. Using sound absorption materials to reduce noise is a way to decrease the hazards of noise pollution.
Xiuhong Li +5 more
doaj +1 more source
Angle-Dependent Absorption of Sound on Porous Materials
Acoustics, 2020 Sound-absorbing materials are usually measured in a reverberation chamber (diffuse field condition) or in an impedance tube (normal sound incidence). In this paper, we show how angle-dependent absorption coefficients could be measured in a factory-type ...
Jose Cucharero +2 more
doaj +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
doaj +1 more source
Acoustic absorption by sunspots
The Astrophysical Journal, 1987 The paper presents the initial results of a series of observations designed to probe the nature of sunspots by detecting their influence on high-degree p-mode oscillations in the surrounding photosphere. The analysis decomposes the observed oscillations into radially propagating waves described by Hankel functions in a cylindrical coordinate system ...
Barry J. Labonte +2 more
openaire +2 more sources
On the Use of Perforated Sound Absorption Systems for Variable Acoustics Room Design
Buildings, 2021 An important challenge for acoustic engineers in room acoustics design is related to the acoustic performance of multi-purpose auditoriums, which are typically designed to suit several performance requirements.
Andreia Pereira +7 more
doaj +1 more source