Estimating and rejecting the main self-noise of sonar-position by noise cancelling method

The propeller noise in the self noise of ships head sonar position is successfully rejected atabove 40 dB by means of the noise cancelling method with revised adaptive lattice filter in this paper.The improved LSL algorithm is characterized by rapid convergence, high accuracy, and widecaband noiserejecfion. The above mentioned noise cancelling system (software) is used to the contribution of eachnoise source for the self-noise field of sonar position and satisfactery results are abtained on determiningmain noise source.