一种利用增益可控部件与微机组成的环路对大动态范围的水声脉冲信号进行脉冲内增益控制并进行幅度精测的方法。-A method for controlling the gain of an underwater acoustic pulse signal in a large dynamic range by using a gain controllable component and a loop of a microcomputer and a method for measuring the amplitude of the underwater acoustic impulse signal is carried out.