二次世界大战前后发展起来的声纳技术及廿世纪六十年代早期所发展起来的声成像技术,已成为一种较成熟的技术,并在实践中得到了广泛应用。一般声成像有两种方法:一种是声透镜方法;另一种是相关接收成像。前者在用于水下探索时需要庞大的声透镜系统,因而一般采用兆周频带。在作无损检验及医学诊断时,不适合水下搜索。目前,声相关接收技术已发展成为军舰水中搜索和监视的较先进的技术,並得到了广泛应用。 The sonar technology developed before and after the Second World War and the acoustic imaging technology developed in the early 1960s have become a relatively mature technology and have been widely used in practice. There are two general methods of acoustic imaging: one is the acoustic lens method and the other is related to receiving imaging. The former requires a large acoustic lens system when used for underwater exploration and therefore generally adopts the mega-week band. For non-destructive testing and medical diagnosis, not suitable for underwater search. At present, the acoustic correlation receiving technology has developed into a more advanced technology for naval water search and surveillance and has been widely used.