摘要A geoacoustic inversion method based on dispersion characteristic of normal modes is presented. An adaptive time-frequency analysis technique with a high resolution in both time and frequency domains is applied to derive the dispersion characteristic of normal modes from the broadband propagation signal. The bottom acoustic parameters are inverted by matching the calculated group delays of normal modes with the experimental data. Finally, some experimental results which could validate the inversion method are given.
Abstract：A geoacoustic inversion method based on dispersion characteristic of normal modes is presented. An adaptive time-frequency analysis technique with a high resolution in both time and frequency domains is applied to derive the dispersion characteristic of normal modes from the broadband propagation signal. The bottom acoustic parameters are inverted by matching the calculated group delays of normal modes with the experimental data. Finally, some experimental results which could validate the inversion method are given.
(Acoustics of sediments; ice covers, viscoelastic media; seismic underwater acoustics)
引用本文:
LI Zheng-Lin;ZHANG Ren-He. Geoacoustic Inversion Based on Dispersion Characteristic of Normal Modes in Shallow Water[J]. 中国物理快报, 2007, 24(2): 471-474.
LI Zheng-Lin, ZHANG Ren-He. Geoacoustic Inversion Based on Dispersion Characteristic of Normal Modes in Shallow Water. Chin. Phys. Lett., 2007, 24(2): 471-474.
[1] Zhou J X 1985 J. Acoust. Soc. Am. 78 1003 [2] Zhou J X, Zhang X Z and Rogers P H 1987 J. Acoust. Soc. Am. 82 2068 [3] Li Z L et al 2003 Chin. J. Acoust. 22 176 [4] Potty G R et al 2000 J. Acoust. Soc. Am. 108 973 [5] Potty G R and Miller J H 2003 J. Acoust. Soc. Am. 1141874 [6] Zhang D M, Li Z L and Zhang R H 2005 Acta Acoust. 30415 (in Chinese) [7] Jones D L and Baraniuk R G 1995 IEEE Trans. Signal Proc. 43 2361 [8] Li Z L and Zhang R H 2004 Chin. Phys. Lett. 21 1100
2007, Vol. 24 
