Results 181 to 190 of about 5,220 (217)

Steady-state acoustic reflectometry for the reconstruction of solid cylindrical cavities

Proceedings of the Second Joint 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society] [Engineering in Medicine and Biology, 2002
Acoustic pulse reflectometry has been used in the past for the indirect determination of the cross-section area vs. distance function describing the geometry of solid cylindrical cavities such as the upper airway tract. Excitation pulse bandwidth, noise and system losses are usually the main experimental issues and sources of reconstruction error in ...
E. Ceron, O. Yanez, R. Gonzalez
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Two-Axis Solid-State Microgyroscope on Surface Acoustic Waves

Mekhatronika, Avtomatizatsiya, Upravlenie, 2019
This article focuses on the development of a two-axis solid state micro gyroscope (SMG) on surface acoustic waves (SAW). The described gyroscope belongs to the category of inexpensive sensing elements featuring a high degree of longtime overload stability.
V. P. Sizov, V. N. Pogorelov, Yu. V. Vakhtin   +2 more
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An electrically injected solid-state surface acoustic wave phonon laser

Nature
Surface acoustic waves (SAWs) enable a wide array of technologies, including radiofrequency filters1,2, chemical and biological sensors3-5, acousto-optic devices6-8, acoustic control of microfluidic flow in lab-on-a-chip systems9-11 and quantum phononics12-19.
Alexander Wendt, Matthew J. Storey, Michael Miller, Dalton Anderson, Eric Chatterjee, William Horrocks, Brandon Smith, Ping-Show Wong, Shawn Arterburn, Thomas A. Friedmann, Lisa Hackett, Matt Eichenfield   +11 more
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Q-factor of acoustic modes of a solid-state resonator at low temperatures

Measurement Techniques, 2011
The acoustic characteristics of a cylindrical sample made of an aluminum alloy (model of gravity detector) in the course of cooling to temperatures on the order of the boiling point of liquid helium are studied. A specialized cryostat with working chamber having a large volume is presented.
R. G. Amamchyan, A. M. Motylev, V. A. Krysanov, S. I. Oreshkin, V. N. Rudenko, A. N. Tsepkov   +5 more
openaire   +1 more source

A solid-state modulator for environmental applications of pulsed acoustics

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358), 2003
Environmentally friendly control of organic and inorganic fouling of machinery and piping systems is a pressing challenge for both military and civilian institutions, such as the US Navy and the electric power industry. In proof-of-principal testing, pulsed acoustics based on pulsed power modulators has proven effective for both cleaning and prevention
openaire   +1 more source

Acoustical measurement of solid state non-linearity: Application to CsCdF3 and KZnF3

Journal of Sound and Vibration, 1983
Abstract Combination of the results of two sets of measurements on the same crystalline samples of CsCdF3 and KZnF3 has made possible the evaluation of the third-order elastic (TOE) constants of these two fluoroperovskites. In the first technique the hydrostatic pressure dependence of the velocity of ultrasonic waves of different propagation and ...
M.A. Breazeale, J. Philip, A. Zarembowitch, M. Fischer, Y. Gesland   +4 more
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Acoustic intensity modulation of solid-state lasers by means of a rocking mirror

Soviet Journal of Quantum Electronics, 1984
Intensity modulation was produced in ruby and YAG:Nd3+ lasers by varying the angle of inclination of one of the resonator mirrors (rocking the mirror) at an ultrasonic frequency. Modulation occurred at twice the frequency of the excited mirror vibrations, the average intensity of the emission spikes simultaneously increased by a factor of more than 10,
G N Belova, E I Remizova
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Quasi-steady-state surface acoustic waves at a rough solid surface

Solid State Communications, 1982
Abstract Sound propagation along an inhomogeneous solid-vacuum interface is considered. The frequency-wavenumber relation has been obtained for the transverse-polarized surface wave and the range of existence of this wave has been analyzed. The surface roughness is shown to produce additional damping.
A.A. Bulgakov, S.I. Khankina
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Two-frequency acoustic modulation of the intensity of radiation emitted by solid-state lasers

Soviet Journal of Quantum Electronics, 1982
Internal two-frequency modulation of the intensity of radiation emitted by ruby, neodymium glass, and YAG lasers was achieved by simultaneous excitation of a 5–25 MHz surface acoustic wave on one of the resonator mirrors and longitudinal ultrasonic vibrations of 20–100 kHz frequency of the other mirror.
G N Belova, E I Remizova
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Defect states of acoustic waves in a two-dimensional lattice of solid cylinders

Journal of Applied Physics, 1998
Using the plane-wave expansion method, we study the propagation of acoustic waves through two-dimensional (2D) periodic composites consisting of solid cylinders in air. Defect in those structures create localized states inside the band gaps. We study both single and line defects.
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