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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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A Universal Filter Approximation of Edge Diffraction for Geometrical Acoustics
IEEE/ACM Transactions on Audio Speech and Language Processing, 2023 Sound propagation in urban and indoor environments often involves diffraction at corners, finite objects and openings, resulting in perceptually relevant frequency-dependent attenuation.
C. Kirsch, S. Ewert
semanticscholar +3 more sources
Prediction of jet mixing noise with Lighthill's Acoustic Analogy and geometrical acoustics [PDF]
The Journal of the Acoustical Society of America, 2017 A computational aeroacoustics prediction tool based on the application of Lighthill's theory is presented to compute noise from subsonic turbulent jets. The sources of sound are modeled by expressing Lighthill's source term as two-point correlations of the velocity fluctuations and the sound refraction effects are taken into account by a ray tracing ...
Ilário, Carlos R.S. +4 more
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Acoustic geometric-phase meta-array [PDF]
New Journal of Physics, 2021 Abstract Metasurfaces based on geometric phase acquired from the conversion of the optical spin states provide a robust control over the wavefront of light, and have been widely employed for construction of various types of functional metasurface devices.
Bingyi Liu +5 more
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An archaeoacoustic study on shape: the case study of the Iffland Theatre’s history (1802–1817)
Acta Acustica, 2023 Previous studies have discussed six pre-Sabine quantifiable guidelines employed in room acoustic design: voice directivity, audience rake, “echo theory”, stage acoustics, reverberation, and length, width, and height ratios.
Postma Barteld N.J., Katz Brian F.G.
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Applied Acoustics, 2021 It has been reported that Direction-of-Arrival (DoA) distribution of reflected sounds is not isotropic in late reverberation. However, it is not clear how room characteristics contribute to the anisotropic DoA distribution.
Yuto Izumi, M. Otani
semanticscholar +1 more source
An Iterative Ray Tracing Algorithm to Increase Simulation Speed While Maintaining Overall Precision
Acoustics, 2023 Ray tracing is a frequently used method for acoustic simulations, valued for its calculation speed and ease of use. Although it is fast, there are no fully ray tracing-based real-time simulation methods or engines.
Hanna Autio +2 more
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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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A filter representation of diffraction at infinite and finite wedges [PDF]
JASA Express Letters, 2022 Diffraction of sound occurs at sound barriers, building and room corners in urban and indoor environments. Here, a unified parametric filter representation of the singly diffracted field at arbitrary wedges is suggested, connecting existing asymptotic ...
Stephan D. Ewert
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Numerical geometric acoustics [PDF]
The Journal of the Acoustical Society of America, 2020 We present a new approach to offline room acoustic modeling and simulation based on solving the eikonal equation, a nonlinear partial differential equation describing the arrival times of a high-frequency wavefront. We call the approach numerical geometric acoustics, since it combines some of the advantages of both numerical acoustics, where the ...
Samuel F. Potter +2 more
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