Parametric estimation of ultrasonic phase velocity and attenuation in dispersive media
作者: Jesper MartinssonJohan E. Carlson
作者单位: 1EISLAB, Luleå University of Technology, SE-971 87 Luleå, Sweden
刊名: Ultrasonics, 2006, Vol.44 , pp.e991-e994
来源数据库: Elsevier Journal
DOI: 10.1016/j.ultras.2006.05.058
关键词: System identificationPulse-echo ultrasoundPhase velocityAttenuation
原始语种摘要: Abstract(#br)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.
全文获取路径: Elsevier  (合作)
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影响因子:2.028 (2012)

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关键词翻译
关键词翻译
  • attenuation 衰减
  • velocity 速度
  • ultrasonic 超音波的
  • media 中脉
  • ultrasound 超声
  • estimation 估计
  • identification 辨认
  • dispersive 扩散的
  • phase 相位