Real time digital signal process is an important part of sonar system. This part searches and measures targets by processing sound signal.

实时数字信号处理是声纳系统中的重要组成部分，通过对水声信号的分析处理完成对目标的搜寻和测量。

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Plessey makes analogue chips, which digitise and process signals such as sound and light, rather than the digital sort that Intel makes for computers.

ECONOMIST: A big name from the past hopes for a bright future