The Journal of the Acoustical Society of America

Journal: The Journal of the Acoustical Society of America

Abbreviation

J Acoust Soc Am

Publisher

American Institute of Physics

ISSN

0001-4966
1520-8524

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Publications 1 - 10 of 26

Internal absorbing boundary conditions for closed-aperture wavefield decomposition in solid media with unknown interiors
Li, Xun; Robertsson, Johan O.A.; Curtis, Andrew; et al. (2022)
The Journal of the Acoustical Society of America
We present a method to create an internal numerical absorbing boundary within elastic solid media whose properties are largely unknown and use it to create the first wavefield separation method that retrieves all orders of outgoing elastic wavefield constituents for real data recorded on a closed free surface. The recorded data are injected into a numerical finite-difference (FD) simulation along a closed, transparent surface, and the new internal numerical absorbing boundary condition achieves high attenuation of the ingoing waves radiated from the injection surface. This internal wave absorption enables the data injection to radiate all outgoing waves for experimental domains that include arbitrary unknown scatterers in the interior. The injection-absorption-based separation scheme is validated using three-dimensional (3D) synthetic modeling and a real data experiment acquired using a 3D laser Doppler vibrometer on a granite rock. The wavefield separation method forms a key component of an elastic immersive wave experimentation laboratory, and the ability to numerically absorb ingoing scattered energy in an uncharacterized medium while still radiating the true outgoing energy is intriguing and may lead to other development and applications in the future.
Acoustic radiation force acting on a heavy particle in a standing wave can be dominated by the acoustic microstreaming
Pavlic, Alen; Baasch, Thierry; Dual, Jürg (2020)
The Journal of the Acoustical Society of America
Expression of emotional valence in pig closed-mouth grunts: Involvement of both source- and filter-related parameters
Briefer, Elodie F.; Vizier, Emilie; Gygax, Lorenz; et al. (2019)
The Journal of the Acoustical Society of America
On space-time media that compute their own inverse
van Manen, Dirk‐Jan; Aichele, Johannes; Müller, Jonas; et al. (2023)
The Journal of the Acoustical Society of America
Immersive wave control experimentation using compensated directive sources
Li, Xun; Börsing, Nele; Becker, Theodor S.; et al. (2019)
The Journal of the Acoustical Society of America
Large scale metasurfaces for seismic waves control
Palermo, Antonio; Krödel, Sebastian; Matlack, Kathryn H.; et al. (2018)
The Journal of the Acoustical Society of America
Highly efficient acoustophoretic single cell-supernatant separation inside nanoliter droplets
Gerlt, Michael; Haidas, Dominik; Ratschat, Alexandre; et al. (2020)
The Journal of the Acoustical Society of America
Immersive experimentation: A new paradigm for low-frequency acoustic and elastic wave propagation experimentation
van Manen, Dirk-Jan; Becker, Theodor S.; Börsing, Nele; et al. (2018)
The Journal of the Acoustical Society of America
Sound wave channelling in near-critical sulfur hexafluoride (SF₆)
Schlamp, Stefan; Rösgen, Thomas (2004)
The Journal of the Acoustical Society of America
Strong density and speed of sound gradients exist in fluids near their liquid-vapor critical point under gravity. The speed of sound has an increasingly sharp minimum and acoustic waves are channelled within a layer of fluid. Geometrical acoustic calculations are presented for different isothermal fluid columns of sulfur hexafluoride (SF6) under gravity using a semiempirical crossover equation of state. More than 40% of the emitted acoustic energy is channelled within a 20 mm high duct at 1 mK above the critical temperature. It is shown how, by changes in temperature, frequency, and gravitational strength, the governing length scales (wavelength, radius of ray curvature, and correlation length of the critical density fluctuations) can be varied. Near-critical fluids allow table-top sound channel experiments.
Compensating for source directivity in immersive wave experimentation
Li, Xun; Robertsson, Johan O.A.; Curtis, Andrew; et al. (2019)
The Journal of the Acoustical Society of America

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