Results 21 to 30 of about 1,493,631 (236)
Tunable Perforated Panel Sound Absorbers for Variable Acoustics Room Design
Applied SciencesVariable acoustics systems are promising engineering developments for multi-purpose rooms and workspaces in many buildings. However, due to space requirements associated with most of the tuning devices used for that purpose, these solutions are hardly ...
Jesús Carbajo +7 more
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Absorption and impedance boundary conditions for phased geometrical-acoustics methods [PDF]
Journal of the Acoustical Society of America, 2012 Defining accurate acoustical boundary conditions is of crucial importance for room acoustic simulations. In predicting sound fields using phased geometrical acoustics methods, both absorption coefficients and surface impedances of the boundary surfaces ...
Cheol-Ho Jeong
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Journal of Engineered Fibers and Fabrics, 2023 This study focuses on the development and characterization of pigeon pea stalk/cotton fibers mixed with a blend ratio of 50/50, 70/30, 30/70, 60/40, 100/0 waste cotton and 0/100 waste pea stalk composites are equipped with a compression molding system ...
Veeraprabahar Jawahar +3 more
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The Application of Nanofibrous Resonant Membranes for Room Acoustics
Nanomaterials, 2023 Solitary sound absorbing elements exist; however, their construction is massive and heavy, which largely limits their use. These elements are generally made of porous materials that serve to reduce the amplitude of the reflected sound waves.
Klara Kalinova
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Optimal Absorption of Acoustic Waves by a Boundary [PDF]
SIAM Journal on Control and Optimization, 2021 In the aim to find the simplest and most efficient shape of a noise absorbing wall to dissipate the acoustical energy of a sound wave, we consider a frequency model described by the Helmholtz equation with a damping on the boundary. The well-posedness of the model is shown in a class of domains with d-set boundaries (N -- 1 $\le$ d < N).
Magoulès, Frédéric +3 more
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Microwave and Acoustic Absorption Metamaterials
Physical Review Applied, 2022 Wave absorption metamaterials have been an enduring topic over the past two decades, propelled not only by novel scientific advances, but also by their extensive application potential. In this review, we aim to provide some general insights into the absorption mechanism common to both microwave and acoustic systems.
Sichao Qu, Ping Sheng
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Absorption characteristics of large acoustic metasurfaces
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2022 Metasurfaces formed of arrays of subwavelength resonators are often tuned to ‘critically couple’ with incident radiation, so that at resonance dissipative and radiative damping are balanced and absorption is maximized. Such design criteria are typically derived assuming an infinite metasurface, whereas the absorption characteristics of ...
O. Schnitzer, R. Brandão
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An Archaeoacoustics Analysis of Cistercian Architecture: The Case of the Beaulieu Abbey
Acoustics, 2021 The Cistercian order is of acoustic interest because previous research has hypothesized that Cistercian architectural structures were designed for longer reverberation times in order to reinforce Gregorian chants.
Sebastian Duran +2 more
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Experimental Validation of the Model of Reverberation Time Prediction in a Room
Buildings, 2022 It is well known that the uncertainty of input data has a great influence on the accuracy of room acoustics simulations. The aforementioned accuracy is significantly influenced by the selection of the acoustic properties of room-delimiting materials ...
Artur Nowoświat, Marcelina Olechowska
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