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 article, the first observation of the generation of surface waves in a broad frequency band (0.2
Abstract: This paper describes the first observation of the generation of surface waves in a broad frequency band (0.2
3 citations
Book•
01 Jan 1969
3 citations
Patent•
26 Jun 2009
TL;DR: In this paper, an acoustic impedance sensor designed to measure the input acoustic impedance of a waveguide is described, which is characterized in that the source is a piezoelectric wafer which allows the determination of the acoustic impedance.
Abstract: The present invention relates to an acoustic impedance sensor designed to measure the input acoustic impedance of a waveguide. This sensor is characterized in that the source is a piezoelectric wafer which allows the determination of the acoustic impedance of a passive acoustic element to remain coherent for low frequencies while keeping the implementation of the sensor inexpensive.
3 citations
TL;DR: In this article, a variable path acoustic interferometer for use at cryogenic temperatures is described, which is enabled without mechanical coupling via two piezoelectric bimorphs wired and mounted in a manner that preserves the parallelism of two ultrasonic transducers that define the acoustic path.
Abstract: We describe a variable path acoustic interferometer for use at cryogenic temperatures. Movement is enabled without mechanical coupling via two piezoelectric bimorphs wired and mounted in a manner that preserves the parallelism of two ultrasonic transducers that define the acoustic path. A certain degree of in situ alignment can also be accomplished. Path length sweeps from 0 to 180 μm have been made at cryogenic temperatures and preliminary sound velocity measurements in liquid 4He and gaseous 3He near 4 K are presented which agree well with past measurements.
3 citations