| 摘 要： | A method for the inversion of the transmission losses for the bottom reflection loss is proposed on thebasis of the theory of the smooth-averaged sound field.The procedure of the inversion is based on the cri-terion of the least square error in the transmission losses between calculation and measurement.By using theGauss-Newton iterative approach,the non-linear least square aloqrithm is equivalent to solving a se-quence of lineared least square problems.The physical causes of the instability of the invertion problem arediscussed and the stability is improved by means of the Levenberg-Marquardt method.Both numericalsimulations with noise and experimental results show that the inversion for the bottom reflection loss ofsmall grazing angle has high precision and the certain perturbation in the measured transmission losses doesnot lead to serious deviation in the inversion result of the bottom reflection loss.
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