潜艇最大的特点就是它的隐蔽性,战备状态时需要长时间在水下潜航(如图1所示),这就决定它不能浮出水面使用雷达观察,而只能依靠声呐进行探测.因此,声呐被称为潜艇的“耳目”.潜艇为何要安装声呐声呐是英文缩写“SONAR”的音译,其中文全称为:声音导航与测距(Sound Navigation And Ranging).我们知道,声音可以在固体、液体和气体中传播,而且遇到障碍物后会被反射回来.潜艇声呐就是利用声波能在水中传播的特性,通过电声转换和信息处理,完成对水下目标探测、定位和通讯的电子设备.在水中进行观察和探测,声波具有得天独厚的优 Submarine is its biggest characteristic of the hidden nature of the state of war preparedness takes a long time underwater dive (Figure 1), which determines that it can not surface the use of radar observations, and can only rely on sonar to detect.Therefore, Sonar is called submarine “ears ”. Why submarine to install sonar sonar is the acronym “SONAR ” transliteration, the Chinese full name: sound navigation and ranging (Sound Navigation And Ranging). We know that the sound Can spread in solid, liquid and gas, and will be reflected back after encountering obstacles Submarine sonar is the use of sound waves in the water can spread the characteristics of the electro-acoustic conversion and information processing to complete the underwater target detection, positioning and Communication of electronic equipment. In the water for observation and exploration, sound waves have unique advantages