Results 21 to 30 of about 2,694 (304)
The Nonlinear Eigenfrequency Problem of Room Acoustics with Porous Edge Absorbers
, 2023 Using porous absorbers is common practice in the acoustic treatment of rooms. To reduce low-frequency reverberation in rooms, the absorber material is often placed in one or more edges of the room.
Kraxberger, Florian; orcid: +5 more
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Acoustic Shooting and Bounce Ray Method for Calculating Echoes of Complex Underwater Targets
Applied Sciences, 2022 The acoustic scattering characteristics of a target are of great significance to the design of underwater acoustic detection systems. With the improvement in underwater weapon detection ability, the precision and accuracy of underwater target echo ...
Gang Zhao +4 more
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Bandwidth and resolution of super-resolution imaging with perforated solids
AIP Advances, 2011 Recent experiments on acoustic superlens and hyperlens found anisotropic metamaterials constructed from periodic perforated solids can be used for super-resolution imaging.
Zixian Liang, Jensen Li
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Asymptotical solutions for a vibrationally relaxing gas
Mathematical Modelling and Analysis, 2009 Using the weakly non‐linear geometrical acoustics theory, we obtain the small amplitude high frequency asymptotic solution to the basic equations governing one dimensional unsteady planar, spherically and cylindrically symmetric flow in a vibrationally ...
Rajan Arora
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On the sensitivity of the design of composite sound absorbing structures
Materials & Design, 2021 The acoustic properties of composite structures made of a perforated panel, an air gap, and a porous layer, can be studied numerically by a combined use of ad hoc optimization and sensitivity analysis methods.
V.H. Trinh, J. Guilleminot, C. Perrot
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Time-domain impedance boundary condition modeling with the discontinuous Galerkin method for room acoustics simulations [PDF]
, 2020 The time-domain nodal discontinuous Galerkin (TD-DG) method is emerging as a potential wave-based method for three-dimensional (3D) room acoustics modeling, where high-order accuracy in the low frequency range, geometrical flexibility and accurate ...
Wang, Huiqing +3 more
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, 2019 St Cecilia’s Hall, Scotland’s oldest purpose-built concert hall, has a distinctive elliptical-domed shape that exhibits non-diffuse acoustical characteristics.
D'Orazio, D. +7 more
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Filter-based first- and higher-order diffraction modeling for geometrical acoustics
Acta AcusticaGeometrical acoustics (GA) offers a high computational efficiency, as required for real-time renderings of complex acoustic environments with applications in, e.g., hearing research, architectural planning, and entertainment.
Kirsch Christoph, Ewert Stephan D.
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Acoustics, 2023 Acoustic materials are widely used for improving interior acoustics based on their sound absorptive or sound diffusive properties. However, common acoustic materials only offer limited options for customizable geometrical features, performance, and ...
Vaia Tsiokou +4 more
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Algebraic reflections in geometric acoustics [PDF]
Proceedings of Meetings on Acoustics, 2017 Stochastic Ray tracing is one of the most widely used geometric acoustic algorithms, and excels primarily for modelling the late room response in high frequencies. A significant bottleneck of the algorithm is the high computational cost of testing rays for intersection with geometry, and the high amount of rays required for convergence. Several methods
Erik Molin, Delphine Bard, Juan Negreira
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