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Acoustic interferometer

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


Papers
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Journal ArticleDOI
TL;DR: In this article, a line-focused lensless ultrasonic transducers for measuring the velocities of surface acoustic waves is described, and the results of measurements of test samples are presented, and algorithms for processing the output spatial-temporal signals are described.
Abstract: A pulse broadband gauge designed for measurements of the velocities of surface acoustic waves is described. The gauge’s output signal is formed during mechanical translation of focused ultrasonic transducers relative to a specimen under study placed in an immersion liquid. A design of the device with line-focused lensless ultrasonic transducers for the frequency range 2–25 MHz is considered. The results of measurements of test samples are presented, and the algorithms for processing the output spatial-temporal signals for determining the frequency dependences of phase velocities of acoustic waves are described. Using a carbon steel sample as an example, it is shown that the random error component in acoustic-wave velocity measurements can be estimated as ±(2–8) and ±(1–3) m/s for longitudinal and lateral scanning modes, respectively.
Proceedings ArticleDOI
05 Oct 2003
TL;DR: In this article, a comparative analysis of different definitions of the electromechanical coupling coefficient is carried out for plane bulk acoustic waves and the results show that the use of such approach to definition of EM coupling coefficient in some cases becomes unacceptable or inadequate and this fact leads to necessity of more precise definition.
Abstract: As is well known electromechanical coupling coefficient is extraordinarily important parameter, which defines the measure of acoustic wave piezoactivity and allows comparison of various types of waves from united consideration. Traditionally this coefficient is defined as fractional change in square of wave velocity due to total or partial "turning off" of piezoeffect. However, recently there appear publications showing that use of such approach to definition of electromechanical coupling coefficient in some cases becomes unacceptable or inadequate and this fact leads to necessity of more precise definition. At present in spite of its traditional estimation there exist at least two different definitions from energy consideration. In this paper having basically the methodological meaning on example of plane bulk acoustic waves we first carried out the comparative analysis of different definitions of the electromechanical coupling coefficient.
Patent
29 Jan 2001
TL;DR: In this paper, an independent claim is made for an operating method for a density or volumetric mass measurement device, in which the device is immersed in the fluid, waves are transmitted and received and a temporal, frequency or spatial analysis is undertaken on the received waves diffused by the diffuser.
Abstract: Device for measuring the density or the volumetric mass of a fluid comprises a diffuser of acoustic or ultrasonic waves, perfectly defined with respect to its geometry and acoustic characteristics, means for production and receipt of acoustic or ultrasonic waves and means for analysis of the received waves. An independent claim is made for an operating method for a density or volumetric mass measurement device. Accordingly the device is immersed in the fluid, waves are transmitted and received and a temporal, frequency or spatial analysis is undertaken on the received waves diffused by the diffuser.
Journal ArticleDOI
TL;DR: In this article, it was shown that the amplification of acoustic waves by absorption of laser radiation can be measured in the laboratory in the presence of a single antenna and a single generator.
Abstract: A calculation shows that amplification of acoustic waves by absorption of laser radiation should be measurable in the laboratory.

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20223
20182
201722
201627
201529
201433