Development of explicit diffraction corrections for absolute measurements of acoustic nonlinearity parameters in the quasilinear regime

作者：Jeong, Hyunjo^*; Zhang, Shuzeng; Cho, Sungjong; Li, Xiongbing

来源：Ultrasonics, 2016, 70: 199-203.

DOI：10.1016/j.ultras.2016.05.003

• Diffraction correction
• Quasilinear theory
• Multi-Gaussian beam
• Nonlinearity parameter

In absolute measurements of acoustic nonlinearity parameters, amplitudes of harmonics must be corrected for diffraction effects. In this study, we develop explicit multi-Gaussian beam (MGB) model-based diffraction corrections for the first three harmonics in weakly nonlinear, axisymmetric sound beams. The effects of making diffraction corrections on nonlinearity parameter estimation are investigated by defining "total diffraction correction (TDC)". The results demonstrate that TDC cannot be neglected even for harmonic generation experiments in the nearfield region.

• 出版日期2016-8
• 单位中南大学