Results 231 to 240 of about 295,337 (289)

Overview of geometrical room acoustic modeling techniques [PDF]

Journal of the Acoustical Society of America, 2015
Computerized room acoustics modeling has been practiced for almost 50 years up to date. These modeling techniques play an important role in room acoustic design nowadays, often including auralization, but can also help in the construction of virtual environments for such applications as computer games, cognitive research, and training.
Peter Svensson, Lauri Savioja
exaly   +4 more sources

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Numerical Geometric Acoustics

2021
Sound propagation in air is accurately described by a small perturbation of the ambient pressure away from a quiescent state. This is the realm of linear acoustics, where the propagation of a time-harmonic wave can be modeled using the Helmholtz equation.
openaire   +2 more sources

Web-based geometric acoustic simulator

Proceedings of the 23rd International ACM Conference on 3D Web Technology, 2018
Geometric acoustics is one of the most commonly used techniques for exploring what a virtual environment sounds like. These methods allow the user to place a sound source and receiver in a space and compute how the space influences what the receiver hears. These simulation methods are well-known, but most are proprietary or difficult to implement.
Taylor, Micah, Meng, F.
openaire   +2 more sources

Geometrical Crystal Acoustics

1984
Publisher Summary This chapter discusses geometrical crystal acoustics. Acceleration waves in an inhomogeneous and anisotropic two-dimensional elastic solid are studied using compatibility relations generalized from those of T. Y. Thomas. Ray directions and an integral expression for decay are obtained in the case of differentiable inhomogeneity of ...
R.S.D. Thomas, H. Cohen
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Acoustic Geometric and Acoustic Cyclotron Resonances in Gallium

Physical Review B, 1972
Acoustic geometric and acoustic cyclotron resonances in high-purity single crystals of gallium were investigated at 1.3 \ifmmode^\circ\else\textdegree\fi{}K and in the normal geometry where the magnetic field is perpendicular to the wave vector of the ultrasonic waves.
C. Alquié, J. Lewiner
openaire   +1 more source

A Geometrical Acoustics Approach for Calculating the Effects of Flow on Acoustics Scattering

Journal of Sound and Vibration, 1994
Summary: A ray acoustics approach to flow effects on acoustics scattering is considered, based on a combination of geometrical acoustics and the paraxial ray approximation. The approach allows for scattering by objects of arbitrary shapes, inhomogeneous and moving media.
Atalla, N., Glegg, S.
openaire   +1 more source

Nonlinear Geometrical Acoustics

1975
Abstract : The development of the theory of nonlinear wave propagation in both bounded and semi-infinite dissipative media is followed from its origins in the theories of linear geometrical acoustics, simple waves, and acceleration fronts. In Part I, Sections 2 to 5, we consider examples in which only one component wave is excited and describe the ...
Brian R. Seymour, Michael P. Mortell
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Acoustic Propagation in Dispersions and the Geometric Theory of Diffraction

SIAM Journal on Applied Mathematics, 2003
Summary: The ultrasonic characterization of emulsions relies principally upon the theory of thermoacoustic scattering. For a single spherical particle of radius a suspended in a homogeneous medium, the theory provides an exactly soluble solution to the scattering problem.
Brian D. Sleeman, Melvin J. Holmes, M. J. W. Povey, Oliver G. Harlen   +3 more
openaire   +3 more sources

Underwater acoustic imaging: image due to a specular reflector in the geometrical-acoustics limit [PDF]

Journal of Marine Science and Technology, 2006
In underwater acoustic imaging, used to produce high-quality images in turbid waters, a specular reflector can produce a 'pseudoimage' of the receiving array at the reflecting surface.
Blair, David G
exaly   +1 more source

Underwater acoustic sensing using the geometric phase

The Journal of the Acoustical Society of America, 2023
We present a sensing modality using the geometric phase of acoustic waves propagating in an underwater environment. We experimentally investigate the effect of scattering by a small subwavelength perturbation on a flat submerged surface. We represent the state of an acoustic field in the unperturbed and perturbed cases as multidimensional vectors.
Trevor D. Lata, Pierre A. Deymier, Keith Runge, Glen S. Uehara, Todd M. W. Hodges   +4 more
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