Ultrasonic measuring instrument

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jun 1983 English Publisher:Acoustical Society of America (ASA)Journal:The Journal of the Acoustical Society of America, volume 73, pages 2,242-2,242 (issn: 0001-4966, eissn: 1520-8524,

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Authors: Masaru Kohno; Yukia Nakagawa; Takeo Kada; Gunzi Okawara;

doi: 10.1121/1.389494

Ultrasonic measuring instrument

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Abstract

By detecting the instant of a selected zero-crossing of a received ultrasonic signal rather than relying on the instant the amplitude of that received signal exceeds a predetermined reference amplitude in excess of zero, a transit-time measuring instrument can be realized which is free from the measurement errors normally arising from acoustic signal attenuation in the medium through which it passes.

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