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Parametric estimation of ultrasonic phase velocity and attenuation in dispersive media
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
2006 (English)In: Ultrasonics, ISSN 0041-624X, E-ISSN 1874-9968, Vol. 44, no Supplement 1, e991-e994 p.Article in journal (Refereed) Published
Abstract [en]

In ultrasonic characterization of liquids, gases, and solids, accurate estimation of frequency dependent attenuation and phase velocity is of great importance. Non-parametric methods, such as Fourier analysis, suffers from noise sensitivity, and the variance of the estimated quantities is limited by the signal-to-noise ratio. In this paper we present a parametric method for estimation of these properties. Pulse echo experiments in ethane, oxygen and mixtures of the two show that the proposed method can estimate phase velocity and attenuation with up to 50 times lower variance than standard non-parametric methods.

Place, publisher, year, edition, pages
2006. Vol. 44, no Supplement 1, e991-e994 p.
Research subject
Signal Processing
URN: urn:nbn:se:ltu:diva-11674DOI: 10.1016/j.ultras.2006.05.058Local ID: ab136450-d0e3-11db-a0b9-000ea68e967bOAI: diva2:984624
Validerad; 2006; Bibliografisk uppgift: Proceedings of Ultrasonics International (UI’05) and World Congress on Ultrasonics (WCU); 20070306 (ysko)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

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