Acoustic interferometer

About: Acoustic interferometer is a research topic. Over the lifetime, 1493 publications have been published within this topic receiving 19355 citations.

End-fire array of virtual acoustic sources produced by the interaction of cylindrically spreading acoustic waves

Abstract: An experimental study of the interaction between cylindrically spreading acoustic waves in water is described, and experimental results are given. The experimental results are compared with theoretical work separately published by one of the authors.

Surface acoustic wave device with reflected wave at side edges on waveguide suppressed and communication system using the same

Abstract: A surface acoustic wave device comprises a substrate, a plurality of input transducers formed on the substrate for generating first and second surface acoustic waves propagating in opposite directions to each other, and a plurality of waveguides arranged in a direction orthogonal to the propagating direction of the first and second surface acoustic waves on a region where the first and second surface acoustic waves overlap. Each waveguide producing a third surface acoustic wave propagating in a direction where the waveguides are arranged, with the interaction between the first and second surface acoustic waves, and on at least two of the waveguides, third surface acoustic waves reflected at respective side edges cancel each other, and an output transducer converts the third surface acoustic waves propagating from the waveguides into an electrical signal.

Intensity interference in Bragg scattering by acoustic waves with thermal statistics.

Abstract: Angular distributions of the intensity and the fourth-order correlation function are studied for light scattered by acoustic waves with thermal statistics. In the case when the beam diameter exceeds the coherence length of the acoustic wave, the fourth-order correlation function is found to contain an interference structure, whereas the intensity angular distribution has a one-peak shape. \textcopyright{} 1996 The American Physical Society.

Excitation of Surface Acoustic Waves Using Electron Acoustic Microscope

Abstract: A focused, modulated electron beam can generate acoustic bulk waves and surface acoustic waves (SAW) at the surface of a front specimen. By conventional electron acoustic microscope the acoustic bulk waves are detected by a piezoelectric transducer at the rear surface. In this paper, acoustic surface waves which are effectively excited by electron beams are detected at the surface of the specimen. This technique gives better imaging than the bulk wave detection.

Hybridization of acoustic waves in piezoelectric plates

Abstract: The conditions for hybridization of the zero-order and high-order acoustic waves propagating in a piezoelectric crystal plate have been studied. The dependence of the phase velocity of the hybrid waves on the parameter hf (h is the plate thickness and f is the wave frequency) is established for the potassium niobate and lithium niobate plates possessing various crystallographic orientations and conductivities. It is found that hybridization takes place when the conductivity of a thin surface layer exceeds a certain critical value, which can vary within broad limits depending on the plate material and orientation. The degree of dispersive repulsion of the coupled modes grows with increasing electromechanical coupling coefficient.