Results 51 to 60 of about 5,705,389 (145)

Spectrum of the seismic-electromagnetic and acoustic waves caused by seismic and volcano activity [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2005
Modeling of the spectrum of the seismo-electromagnetic and acoustic waves, caused by seismic and volcanic activity, has been done. This spectrum includes the Electromagnetic Emission (EME, due to fracturing piezoelectrics in rocks) and the Acoustic ...
S. Koshevaya   +4 more
doaj  

Characteristic measurement of a surface acoustic wave nano-stepping motor by using a fiber-optic Michelson interferometer

open access: yesAdvances in Mechanical Engineering, 2019
The actuation technique of a surface acoustic wave motor with nanometer scale linear motion was experimentally investigated in this study. The surface acoustic wave motor comprised a stator made of a Y+128° cut, X-propagation lithium niobate substrate ...
Tai-Ho Yu
doaj   +1 more source

The axisymmetric Rayleigh waves in a semi-infinite elastic solid

open access: yesTheoretical and Applied Mechanics Letters, 2020
: It is well-known that Rayleigh wave, also known as surface acoustic wave (SAW), solutions in semi-infinite solids are plane waves with signatory properties like the distinct velocity and exponentially decaying deformation in the depth.
Ji Wang   +6 more
doaj   +1 more source

Feature Detection of Acoustically Induced Sea Surface Micro-motions with Terahertz Radar

open access: yesLeida xuebao, 2023
When underwater acoustic signals propagate to the water surface, the acoustic impedance difference between water and air leads to transverse microamplitude waves on the water surface.
Bin DENG   +5 more
doaj   +1 more source

Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves

open access: yesUltrasonics Sonochemistry
This study experimentally investigates the role of cavitation-induced shock waves in initiating and destabilizing capillary (surface) waves on a droplet surface, preceding atomization.
Abhinav Priyadarshi   +4 more
doaj   +1 more source

Universal Quantum Transducers Based on Surface Acoustic Waves

open access: yesPhysical Review X, 2015
We propose a universal, on-chip quantum transducer based on surface acoustic waves in piezoactive materials. Because of the intrinsic piezoelectric (and/or magnetostrictive) properties of the material, our approach provides a universal platform capable ...
M. J. A. Schuetz   +5 more
doaj   +1 more source

Acoustic radiation from a pulsating spherical cap set on a spherical baffle near a hard/soft flat surface

open access: yes, 2004
Radiation of sound from a spherical piston, set in the side of a rigid sphere, undergoing harmonic radial surface vibrations in an acoustic halfspace is analyzed in an exact fashion using the classical method of separation of variables.
Azarpeyvand, Mahdi   +3 more
core   +1 more source

Measurements of sub-surface bubble populations and the modelling of air-sea gas flux

open access: yes, 2010
Bubbles, formed by breaking waves, play an important role in the transfer of gases between the Earth’s oceans and atmosphere and have been shown to increase the flux of gases during periods of heightened sea state.
Coles, David Geoffrey Hallstaff
core   +1 more source

Perturbation in the atmospheric acoustic field from a large offshore wind farm in the presence of surface gravity waves [PDF]

open access: yes, 2013
In this study a quantitatively reliable approximation of atmospheric sound wave propagation is given in the presence of a large wind farm. Rough sea surface is used as lower boundary condition at the sea surface, and an acoustic point source located at ...
Paskyabi, Mostafa Bakhoday
core   +1 more source

Acoustic Waves

open access: yes, 2011
The concept of acoustic wave is a pervasive one, which emerges in any type of medium, from solids to plasmas, at length and time scales ranging from sub-micrometric layers in microdevices to seismic waves in the Sun's interior. This book presents several

core   +1 more source

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