Topic
Acoustic interferometer
About: Acoustic interferometer is a research topic. Over the lifetime, 1493 publications have been published within this topic receiving 19355 citations.
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TL;DR: In this paper, the authors considered the possibility of excitation of lateral waves in a hot plasma in contact with a perfectly conducting boundary by a mechanical body source and showed that these electro-acoustic lateral waves can be excited also by an electric dipole oriented in the same direction as the source.
Abstract: This paper considers the possibility of excitation of lateral waves in a hot plasma in contact with a perfectly conducting boundary by a mechanical body source. These lateral waves being incident on the conducting surface at a critical angle from the source travel a certain distance along the surface with the phase velocity of light in a cold plasma and the waves are then reflected back at the critical angle to the observer in the compressible plasma. The incident and reflected portions of the path are traversed by the waves with the phase velocity of an acoustic wave in a compressible plasma.
It is shown that these electro-acoustic lateral waves can be excited also by an electric dipole oriented in the same direction as the mechanical body source. The amplitudes of the waves excited by these two different sources are compared.
30 May 2017
TL;DR: In this paper, a Sagnac interferometer is used to detect acoustic signals in water, using a buzzer as the vibration source, this buzzer operates at a frequency range from 3 kHz to 30 kHz.
Abstract: We present a device built in fiber optic capable of detecting acoustic signals in water, using a buzzer as the vibration source, this buzzer operates at a frequency range from 3 kHz to 30 kHz. This device operates under the principle of a Sagnac interferometer, where the acoustic waves emitted by the buzzer are detected as a phase modulation in the monitored signal. The measured phase is due to strain experienced by the fiber optic which is caused by the vibrations emitted by the buzzer. The device can detect signals up to 7 cm away from the acoustic source.
TL;DR: In this paper, the physical properties of surface acoustic waves and their use for processing radar, television and radio signals have been discussed and a brief account of the surface acoustic wave devices such as delay lines, filters, oscillators and convolvers is also presented.
Abstract: The physical properties of surface acoustic waves and their use for processing radar, television and radio signals have been discussed. A brief account of surface acoustic wave devices such as delay lines, filters, oscillators and convolvers is also presented.
27 Oct 2014
TL;DR: In this article, the authors theoretically model the transmission of ultra-short optical pulses by Fabry-Perot interferometer, taking into account multiple waves re-reflection inside interferometers by examination of two superimposed waves.
Abstract: We theoretically model the transmission of ultra-short optical pulses by Fabry- Perot interferometer, taking into account multiple waves re-reflection inside interferometer by examination of two superimposed waves. Based on the analytical and numerical analysis, we calculate the transformations of the optical electric field profiles and optical spectra of the pulses at the output of the interferometer.