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汉语拼音：shēng nà

利用声波在水中传播时遇到障碍物会发生反射的特性，进行水下目标探测与通信的设备和技术。其工作频率可从几百赫至几百千赫，探测距离可从几百米至几十千米。广泛应用于海底勘测、确定礁区范围、搜寻沉船、探测鱼群等；军事上用它对敌方舰艇进行搜索、跟踪、测距、测向、测速等。

声呐 [shēng nà]

1. 利用声波在水中传播时遇到障碍物会发生反射的特性，进行水下目标探测与通信的设备和技术。其工作频率可从几百赫至几百千赫，探测距离可从几百米至几十千米。广泛应用于海底勘测、确定礁区范围、搜寻沉船、探测鱼群等；军事上用它对敌方舰艇进行搜索、跟踪、测距、测向、测速等。

• We picked up two submarines on sonar.

  我们用声呐系统观察到两条潜水艇.

• This ship is installed with two sonar detectors.

  这艘船上安装了两台声呐探测仪.

• A computing model for the self - noise due to sonar cavity is established by using SEA method.

  利用统计能量分析法建立了湍流边界层激励下水下航行器声呐腔自噪声水动力分量的计算模型.

• In this dissertation, we study a supergain array to improve the detection performance of passive sonar.

  本文从提高被动声呐的检测性能出发,提出了超增益阵的设计.

• However, the problem of port and starboard ambiguity can not be resolved by itself.

  拖曳线列阵声呐有其独特的优点, 但它的左右舷模糊问题靠其本身是无法克服的.

• The digital active sonar has many advantages, but we have many problems to realize them.

  首先介绍数字式主动声呐的优点及实现上的特殊困难.

• The problem of time delay estimation ( TDE ) with multipath transmissions arises often in many sonar systems.

  多途时延估计问题经常出现在不同的声呐系统中.

• Detecting sonar pulse transmitted by an active sonar, it is sonar pulse detection.

  声呐脉冲侦察是利用目标主动声呐发射的脉冲信号来探测目标的技术.

• Flow noise in the interior fluid of a vector hydrophone towed linear array is analyzed.

  研究矢量拖曳式线列阵声呐护套管内的流噪声场.