Results 261 to 270 of about 109,668 (295)
Some of the next articles are maybe not open access.
Surface acoustic wave resonators
European Transactions on Telecommunications, 1991AbstractSurface Acoustic Wave (SAW) resonators are implemented by creating a planar resonant cavity, delimited by two distributed, rather than concentrated, mirrors, consisting of arrays of reflecting metal strips. SAW resonators permit to achieve higher frequencies than their bulk‐wave acoustic counterparts with comparable spectral purity and very ...
Gianfranco Avitabile +3 more
openaire +1 more source
Localization of acoustic waves
Physical Review B, 1985The localization of sound waves moving in a random array of hard scatterers is studied for both two- and three-dimensional systems using a diagrammatic technique. For d=2 acoustic waves are found to be localized for all frequencies with the localization length growing exponentially for both high and low frequencies.
openaire +2 more sources
Canadian Journal of Physics, 1962
The spectrum of the gravity and acoustical waves are discussed for two general types of models of the atmosphere. The main emphasis is placed upon the discrete set of modes which are important in the propagation of energy, long distances around the earth, from large explosions in the atmosphere.
openaire +1 more source
The spectrum of the gravity and acoustical waves are discussed for two general types of models of the atmosphere. The main emphasis is placed upon the discrete set of modes which are important in the propagation of energy, long distances around the earth, from large explosions in the atmosphere.
openaire +1 more source
On the Synchronization of Acoustic Gravity Waves
Physica Scripta, 2001Summary: Using the model proposed by \textit{L. Stenflo} [Phys. Lett. A 222, No. 6, 378--380 (1996)], we demonstrate that acoustic gravity waves found in one region of space can be synchronized with acoustic gravity waves found in another region of space using techniques from modern control theory.
Lonngren, Karl E., Bai, Er-Wei
openaire +2 more sources
Solitary surface acoustic waves
Physical Review E, 2004Solitary acoustic pulses can propagate along the surface of a coated homogeneous and inhomogeneous medium. It is shown how these nonlinear surface acoustic waves evolve out of initial pulselike conditions generated by pulsed laser excitation and how they can be monitored by optical detection. The solitary pulse shapes at the surface are computed on the
C, Eckl +4 more
openaire +2 more sources
Dispersion of Ion-Acoustic Waves
The Physics of Fluids, 1967The dispersion of ion-acoustic waves in quiescent rare-gas discharge plasmas has been investigated experimentally and theoretically. Experimentally, various grid systems were used to generate the waves which were studied using a time-of-flight technique. The experimental results show that two separate propagating phenomena appear.
K. Lonngren +3 more
openaire +1 more source
Surface acoustic waves in metals
Journal of Physics C: Solid State Physics, 1984The authors present propagation experiments for surface acoustic waves (SAW) in pure single crystals of aluminium and gallium. Geometric resonances and de Haas-van Alphen oscillations are observed as sound velocity changes. In addition, a typical surface effect, a nonreciprocal effect of the SAW velocity with respect to applied field and propagation ...
J. Heil +3 more
openaire +1 more source
The Journal of the Acoustical Society of America, 2007
A surface acoustic wave element includes a thin film electrode composed of monocrystal aluminum disposed on a piezoelectric substrate. At least one metal of Cu, Ta, W, and Ti is segregated in the thin film electrode composed of monocrystal aluminum. In this surface acoustic wave element, segregation of Cu or the like occurs in the thin film electrode ...
openaire +1 more source
A surface acoustic wave element includes a thin film electrode composed of monocrystal aluminum disposed on a piezoelectric substrate. At least one metal of Cu, Ta, W, and Ti is segregated in the thin film electrode composed of monocrystal aluminum. In this surface acoustic wave element, segregation of Cu or the like occurs in the thin film electrode ...
openaire +1 more source
1992
Abstract Synopsis. Acoustic waves will propagate in any medium that possesses some form of elasticity. In solids, which have both a bulk modulus (the reciprocal of the compressibility) and a shear modulus (or rigidity) wave propagation is complex, involving both longitudinal and transverse waves.
openaire +1 more source
Abstract Synopsis. Acoustic waves will propagate in any medium that possesses some form of elasticity. In solids, which have both a bulk modulus (the reciprocal of the compressibility) and a shear modulus (or rigidity) wave propagation is complex, involving both longitudinal and transverse waves.
openaire +1 more source
1970 Ultrasonics Symposium, 1970
Acoustic surface waves offer several advantages in the construction of delay lines and filters in the UHF range. In these devices the frequency response is determined by the finger spacing and overlap of the interdigital comb structures used as input and output transducers.
R.H. Tancrell, M.G. Holland
openaire +1 more source
Acoustic surface waves offer several advantages in the construction of delay lines and filters in the UHF range. In these devices the frequency response is determined by the finger spacing and overlap of the interdigital comb structures used as input and output transducers.
R.H. Tancrell, M.G. Holland
openaire +1 more source