نتایج جستجو برای: acoustic wave amplification
تعداد نتایج: 345588 فیلتر نتایج به سال:
Underwater acoustics is widely used in many applications, such as oceanography, marine biology, hydrography, fishery, etc. Different models are introduced to simulate the underwater acoustic propagation in the oceans and the seas. In this study, the Ray Theory model is used to simulate the acoustic wave propagation in a shallow-freshwater river (Gono River) located in western part of Japan. The...
Condensation of atoms from the vapor into a third sound resonance is expected to be capable of acoustic amplification. This results from normal to superfluid conversion that coherently accommodates atoms into the third sound velocity field. Consideration of third sound in light of the equilibrium detailed balance between vapor particles and the superfluid film provides further evidence that aco...
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 performance of many acoustic wave-based applications. However, designing acoustic metasurfaces with similar functionality to their electromagnetic count...
There are different ways to treat local obesity and cellulite including invasive and noninvasive methods. Due to the fact that noninvasive methods have significantly lower rates of adverse effects, they become more popular. One of these methods is acoustic wave therapy (AWT) or shock wave therapy (SWT). In addition to treating cellulite, SWT has been found useful for some other conditions. In t...
The process of interaction between circularly polarized coherent transverse phonons and slow electrokinetic waves in the centrosymmetric crystal placed in a longitulinal magnetic field and possessing strong strain dependence of the dielectric constant caused by the electrostriction is considered. The cut-off system of equations for the process of nonlinear four-wave interaction in crystal with ...
Related Articles Extremely low-loss acoustic phonons in a quartz bulk acoustic wave resonator at millikelvin temperature Appl. Phys. Lett. 100, 243504 (2012) Extraction of second order piezoelectric parameters in bulk acoustic wave resonators Appl. Phys. Lett. 100, 232901 (2012) Acoustic resonator based on periodically poled transducers: Concept and analysis J. Appl. Phys. 111, 064106 (2012) Vi...
The aim of this article was to study sound source localization by cochlear implant (CI) listeners with low-frequency (LF) acoustic hearing in both the operated ear and in the contralateral ear. Eight CI listeners had symmetrical LF acoustic hearing and 4 had asymmetrical LF acoustic hearing. The effects of two variables were assessed: (i) the symmetry of the LF thresholds in the two ears and (i...
Acoustic wave devices have been in commercial use for more than 60 years. The telecommunications industry is the largest consumer, accounting for ~3 bil lion acoustic wave filters annually, primarily in mobile cell phones and base stations. These are typically surface acoustic wave (SAW) devices, and act as bandpass filters in both the radio frequency and intermediate frequency sections of the ...
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