結合三參數校正法的充水阻抗管的發展與應用

Translated title of the contribution: DEVELOPMENT AND APPLICATIONS OF A WATER-FILLED IMPEDANCE TUBE BY EMPLOYING THE THREE-PARAMETERS-CALIBRATION METHOD

C. J. Huang, Z. Y. Shen, C. M. Dong, K. W. Liu, Y. C. Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Based on the standard test method provided by ASTM E1050-98 (2006), this work develops a vertical water-filled impedance tube for measuring the underwater acoustic impedance of materials. The three-parameters-calibration method was employed to determine the complex reflection coefficients from the voltage ratio of the sound signals measured by hydrophones at two different locations. This voltage ratio is also referred to as transfer function. Firstly, the developed system was used to measure the complex reflection at the interface between the water and the free surface. Experimental results reveal that the measured reflection coefficients were closer to the theoretical values compared with those obtained using the transfer function method or the sensor-switching technique. The repeatability of the experimental data was also assured. After having verified the accuracy and repeatability of the experimental results, the developed system was used to measure the acoustic reflection coefficient of various material to test the capability of the developed system for measuring the reflection coefficient of material in the underwater environment. The tested material includes steel, silicon rubber, and PU (polyurethane) rubber. The tests demonstrate that the acoustic reflection coefficients and impedance of material can be easily and accurately measured by the proposed impedance tube combined with the three-parameters-calibration method.

Translated title of the contributionDEVELOPMENT AND APPLICATIONS OF A WATER-FILLED IMPEDANCE TUBE BY EMPLOYING THE THREE-PARAMETERS-CALIBRATION METHOD
Original languageChinese (Traditional)
Pages (from-to)53-65
Number of pages13
JournalJournal of Taiwan Society of Naval Architects and Marine Engineers
Volume40
Issue number2
Publication statusPublished - 2021

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'DEVELOPMENT AND APPLICATIONS OF A WATER-FILLED IMPEDANCE TUBE BY EMPLOYING THE THREE-PARAMETERS-CALIBRATION METHOD'. Together they form a unique fingerprint.

Cite this