Results 71 to 80 of about 129,142 (267)
Acoustic Casimir Pressure for Arbitrary Media [PDF]
, 2004 In this paper we derive a general expression for the acoustic Casimir pressure between two parallel slabs made of arbitrary materials and whose acoustic reflection coefficients are not equal. The formalism is based on the calculation of the local density of modes using a Green's function approach.
arxiv +1 more source
Acoustic diagnostics of femtosecond laser filamentation [PDF]
arXiv, 2023 The promising application of femtosecond laser filamentation in atmospheric remote sensing brings imperative demand for diagnosing the spatiotemporal dynamics of filamentation. Acoustic emission (AE) during filamentation opens a door to give the insight into the dynamic evolution of filaments in air.
arxiv
Wavefront modulation and subwavelength diffractive acoustics with an acoustic metasurface [PDF]
Nature Communications, 2014 Metasurfaces are a family of novel wavefront-shaping devices with planar profile and subwavelength thickness. Acoustic metasurfaces with ultralow profile yet extraordinary wave manipulating properties would be highly desirable for improving the ...
Yangbo Xie +5 more
semanticscholar +1 more source
Acoustic confinement and Stimulated Brillouin Scattering in integrated optical waveguides [PDF]
, 2013 We examine the effect of acoustic mode confinement on Stimulated Brillouin Scattering in optical waveguides that consist of a guiding core embedded in a solid substrate. We find that SBS can arise due to coupling to acoustic modes in three different regimes. First, the acoustic modes may be guided by total internal reflection; in this case the SBS gain
arxiv +1 more source
The Journal of the Acoustical Society of America, 2009 Acoustic metafluids are defined as the class of fluids that allow one domain of fluid to acoustically mimic another, as exemplified by acoustic cloaks. It is shown that the most general class of acoustic metafluids are materials with anisotropic inertia and the elastic properties of what are known as pentamode materials.
openaire +3 more sources
An asymptotic model in acoustics: Acoustic drift equations [PDF]
The Journal of the Acoustical Society of America, 2013 A rigorous asymptotic procedure with the Mach number as a small parameter is used to derive the equations of mean flows which coexist and are affected by the background acoustic waves in the limit of very high Reynolds number.
Vladimirov, Vladimir, Ilin, Konstantin
openaire +5 more sources
Experimental Study on Optoelectronic Submarine Cable Used for Ship Radiation Noise Detection
IEEE AccessIn this study, we connected the DAS (distributed acoustic sensing) system to a 69-km optoelectronic submarine cable located in Hainan, China. A continuous four-day data collection was conducted to assess its potential for monitoring ship radiation noise.
Wei Huang +4 more
doaj +1 more source
Graduate Texts in Physics, 2020 In 2017, I (author B.E.A.) started regularly teaching a course on vibrations and fluids. The first half of this course covers vibrations of a mass-spring system, strings, bars, membranes, and plates.
Steven L. Garrett
semanticscholar +1 more source
EchoPrint: Two-factor Authentication using Acoustics and Vision on Smartphones
ACM/IEEE International Conference on Mobile Computing and Networking, 2018 User authentication on smartphones must satisfy both security and convenience, an inherently difficult balancing art. Apple's FaceID is arguably the latest of such efforts, at the cost of additional hardware (e.g., dot projector, flood illuminator and ...
Bing Zhou +3 more
semanticscholar +1 more source
Analyzing the Nonlinear Performance of Miniature Loudspeakers in Consideration of the Creep Effect
Applied SciencesMiniature loudspeakers exhibit pronounced nonlinear characteristics due to physical size limitations and the demand for sufficient sound pressure.
Simiao Chen +4 more
doaj +1 more source