Results 11 to 20 of about 84,329 (313)
Photospheric high-frequency acoustic power excess in sunspot umbra: signature of magneto-acoustic modes [PDF]
, 2013 We present observational evidence for the presence of MHD (magnetohydrodynamic) waves in the solar photosphere deduced from SOHO/MDI (Solar and Heliospheric Observatory/Michelson Doppler Imager) Dopplergram velocity observations.
Shelyag, S. +14 more
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Acoustic Propagation Characteristics of Metamaterials With Tubular Structures
IEEE Access, 2018 To generate acoustic waves with abnormal transmission characteristics different from those of traditional natural acoustic materials, we studied the propagation of acoustic waves in resonant phononic crystals.
Shuai Tang, Jianning Han
doaj +1 more source
Large-scale numerical modeling of hydro-acoustic waves generated by tsunamigenic earthquakes [PDF]
Natural Hazards and Earth System Sciences, 2015 Tsunamigenic fast movements of the seabed generate pressure waves in weakly compressible seawater, namely hydro-acoustic waves, which travel at the sound celerity in water (about 1500 m s−1).
C. Cecioni +3 more
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Theoretical mass sensitivity of Love wave and layer guided acoustic plate mode sensors [PDF]
, 2002 A model for the mass sensitivity of Love wave and layer guided shear horizontal acoustic plate mode (SH–APM) sensors is developed by considering the propagation of shear horizontally polarized acoustic waves in a three layer system. A dispersion equation
Newton, Michael +8 more
core +1 more source
Entropy, 2019 The hypersonic flow field around a blunt cone was simulated using a high-order finite difference method. Fast acoustic waves, slow acoustic waves, entropy waves, and vortical waves were introduced into the free-stream to determine the influence of a free-
Mingfang Shi +3 more
doaj +1 more source
Observations of acoustic emission activity during gear defect diagnosis. [PDF]
, 2003 It is widely recognised that acoustic emission (AE) is gaining ground as a non- destructive technique (NDT) for health diagnosis on rotating machinery.
Mba, David +3 more
core +1 more source
Wave–wave interactions and deep ocean acoustics [PDF]
The Journal of the Acoustical Society of America, 2013 Deep ocean acoustics, in the absence of shipping and wildlife, is driven by surface processes. Best understood is the signal generated by non-linear surface wave interactions, the Longuet-Higgins mechanism, which dominates from 0.1 to 10 Hz, and may be significant for another octave.
Guralnik, Zachary +3 more
openaire +3 more sources
Localization of classical waves I: Acoustic waves [PDF]
Communications in Mathematical Physics, 1996 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Figotin, Alexander, Klein, Abel
openaire +3 more sources
Bearing defect diagnosis and acoustic emission. [PDF]
, 2003 Acoustic emission (AE) was originally developed for non-destructive testing of static structures, however, over the years its application has been extended to health monitoring of rotating machines and bearings.
Mba, David +3 more
core +1 more source
Interface transmittance and interface waves in acoustic Willis media
Frontiers in Physics, 2023 Acoustics Willis media, known as bianisotropic acoustic media, incorporate additional coupling between pressure and velocity and between momentum and volumetric strain in their constitutive equation.
Hongfei Qu +3 more
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