Measurements of ultrasonic attenuation coefficients of water in VHF/UHF range

6 Citations 17 References
  • HASHIMOTO Yusuke
    Department of Electrical Engineering, Faculty of Engineering, Tohoku University
  • AKASHI Naoyuki
    Department of Electrical Engineering, Faculty of Engineering, Tohoku University
  • KUSHIBIKI Jun-ichi
    Department of Electrical Engineering, Faculty of Engineering, Tohoku University

Bibliographic Information

Other Title
  • VHF/UHF帯における水の超音波減衰係数の測定

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Description

Studies on quantitative measurements of acoustic properties of solids, liquids, and biological materials in the VHF and UHF ranges have been conducted. Reliable data for acoustic properties of distilled water in the frequency ranges have been needed since measurements are performed using the water data as the reference. In this paper, ultrasonic attenuation coefficients of water are determined in the frequency range 50 MHz to 1 GHz and in the temperature range 20℃ to 30 ℃. Diffraction losses are corrected by performing numerical calculation using Williams' formula. The measured attenuation coefficients are proportional to the square of frequency over the frequency range. The value a/f^2 is 21.1×10^<-15>s^2/m at 25.0℃ and is about 4% less than that measured by Pinkerton. The temperature coefficient is -0.61×10^<-15> s^2/m /℃ in this temperature range.

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Details 詳細情報について

  • CRID
    1570572702430379520
  • NII Article ID
    110003187712
  • NII Book ID
    AN1001290X
  • Text Lang
    ja
  • Data Source
    • CiNii Articles

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