Results 31 to 40 of about 1,103,393 (248)

The Influence of Different Scattering Algorithms on Room Acoustic Simulations in Rectangular Rooms

open access: yesBuildings, 2021
Raytracing is a widespread tool for room acoustic simulations, and one of its main advantages is the inclusion of surface scattering. Although surface scattering has been acknowledged as a central aspect of accurate raytracing simulations for many years,
Hanna Autio   +2 more
doaj   +1 more source

Modified Green's Functions for Shallow Water Acoustic Wave Propagation [PDF]

open access: yes, 2004
This article presents an assessment of alternative forms of the Green’s function for boundary element simulations of acoustic wave propagation in shallow water. It is assumed that the problem is two-dimensional, the source of acoustic disturbance is time-
Santiago, J A F S, Wrobel, L C
core   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

open access: yesAdvanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara   +8 more
wiley   +1 more source

OntOMat: Toward Ontology‐Based Product and Process Design Engineering and Optimization Solutions Fueling Circular Value Chains

open access: yesAdvanced Engineering Materials, EarlyView.
The OntOMat ontology establishes a structured framework for polymer matrix fiber reinforced composite materials, integrating manufacturing processes, characterization methods, and multiscale design through the VDI/VDE 3682 formalized process description standard.
Nicolas Christ   +19 more
wiley   +1 more source

Analysis on Acoustic Scattering Characteristics of Icosahedral Composite Quasi-Spherical Scatterer

open access: yes水下无人系统学报
To address the difficulties in deployment and insufficient acoustic adaptability of traditional underwater acoustic standard targets, a lightweight quasi-spherical scatterer with icosahedral buoy-rod composite structure was proposed. Curved buoyant units
Yanhua DONG   +5 more
doaj   +1 more source

Analytic mode-matching for acoustic scattering in three dimensional waveguides with flexible walls: Application to a triangular duct [PDF]

open access: yes, 2012
This is the post-print version of the Article. The official published version can be accessed from the links below - Copyright @ 2012 ElsevierAn analytic mode-matching method suitable for the solution of problems involving scattering in three-dimensional
Lawrie, JB
core   +1 more source

Enhanced Ultrasound Transmission Through Aberration Layers Using Space‐Coiling Acoustic Metamaterials

open access: yesAdvanced Engineering Materials, EarlyView.
Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami   +4 more
wiley   +1 more source

Contra-intuitive features of time-domain Brillouin scattering in collinear paraxial sound and light beams

open access: yesPhotoacoustics, 2020
Time-domain Brillouin scattering is an opto-acousto-optical probe technique for the evaluation of transparent materials. Via optoacoustic conversion, ultrashort pump laser pulses launch coherent acoustic pulses in the sample.
Vitalyi E. Gusev
doaj   +1 more source

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

Underwater Acoustic Scattering from Multiple Ice Balls at the Ice–Water Interface

open access: yesRemote Sensing
We investigate the underwater acoustic scattering from various distributed “ice balls” floating on the water, aiming to understand acoustic scattering in the marginal ice zone (MIZ).
Siwei Hu   +4 more
doaj   +1 more source

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