Analysis and Correction of Diffraction Effect on the B/A Measurement at High Frequencies
ZHANG Dong1, GONG Xiu-Fen1, LIU Xiao-Zhou1, KUSHIBIKI Jun-ichi2, NISHINO Hideo2
1State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093
2Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan
Analysis and Correction of Diffraction Effect on the B/A Measurement at High Frequencies
1State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093
2Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan
Abstract： A numerical method is developed to analyse and to correct the diffraction effect in the measurement of acoustic nonlinearity parameter B/A at high frequencies. By using the KZK nonlinear equation and the superposition approach of Gaussian beams, an analytical model is derived to describe the second harmonic generation through multi-layer medium SiO2/liquid specimen/SiO2. Frequency dependence of the nonlinear characterization curve for water in 110-155 MHz is numerically and experimentally investigated. With the measured dip position and the new model, values of B/A for water are evaluated. The results show that the present method can effectively correct the diffraction effect in the measurement.
ZHANG Dong;GONG Xiu-Fen;LIU Xiao-Zhou;KUSHIBIKI Jun-ichi;NISHINO Hideo. Analysis and Correction of Diffraction Effect on the B/A Measurement at High Frequencies[J]. 中国物理快报, 2004, 21(1): 107-109.
ZHANG Dong, GONG Xiu-Fen, LIU Xiao-Zhou, KUSHIBIKI Jun-ichi, NISHINO Hideo. Analysis and Correction of Diffraction Effect on the B/A Measurement at High Frequencies. Chin. Phys. Lett., 2004, 21(1): 107-109.
2004, Vol. 21 
