$B/A$ Measurement for Liquid Media Using an LN Transducer with Inverted-Domain Layer
スポンサーリンク
概要
- 論文の詳細を見る
A system to measure the acoustic nonlinearity parameter $B/A$ for a liquid medium utilizing a high-frequency focusing Gaussian source has been developed. The 19 MHz sound source employing a LiNbO3 (LN) plate with a ferroelectric inversion layer can emit and receive double frequency sound of 38 MHz. An LN plate with a twisted star-shape electrode is attached to a synthetic silica lens whose radius is much larger than the aperture size and thickness to generate a focused Gaussian beam. Linear properties such as the density, sound speed and attenuation coefficient are determined through a comparison of the pressure amplitude reflected from the solid surface located at the focal plane and the reflector distance to maximize the signal amplitude with those for the case in which the medium is replaced by distilled water. Furthermore, the ratio of the second harmonic amplitude in a sound returned from the reflector set at the focal plane and that in the case of distilled water yields the $B/A$ value through a calculation containing the linear property obtained in advance. The measured result for the linear property and the $B/A$ value of various alcohol samples shows a reasonable agreement with the literature values.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-06-15
著者
-
Nakamura Kiyoshi
Tohoku Univ.
-
Nakamura Kiyoshi
Graduate School of Engineering, Tohoku University
-
Saito Shigemi
Tokai Univ.
-
Saito Shigemi
School Of Marine Science And Technology Tokai University
-
Yamamoto Akira
School of Marine Science and Technology, Tokai University, Orido, Shimizu-Ku, Shizuoka 424-8610, Jap
-
Yamamoto Akira
Tokai Univ.
-
Nakamura Kiyoshi
Graduate School Of Engineering Tohoku University
-
Yamamoto Akira
School of Marine Science and Technology, Tokai University
関連論文
- P2-31 Conversion of 45° rotated X-cut KNbO_3 Plates to Y-cut Plates by Compression(Short presentation for poster)
- Multiple-frequency ultrasonic imaging by transmitting pulsed waves of two frequencies
- Numerical Calculation and Measurement of Nonlinear Acoustic Fields in Ultrasound Diagnosis
- High frequency focusing Gaussian source intended for B/A imaging
- Ultrasonic Focusing Gaussian Source to Receive Nonlinearly Generated Second Harmonic Sound by Itself
- A 3-Terminal AT-Cut Quartz Resonator with Shield Electrodes
- Experiment on Acoustic Field of Parametric Focusing Source
- P3-9 Measurement of the Acoustic Property of Small Volume Liquid Sample beyond Acoustic Window(Poster session 3)
- P1-49 Computation for Secondary Wave of Two Frequency Ultrasound Propagating in Biological Tissues(Poster session 1)
- P2-14 Measurement of the Sound Speed in a Thread(Short oral presentation for posters)