passive sonar meaning in English

被动声呐
被动声纳
被动式声纳
无源声呐
无源声纳

Study on double - threshold tracks correlation algorithm for active sonar to passive sonar
主被动声呐多目标航迹关联的双门限算法研究
Research on technique of passive sonar target recognition based on line spectrum feature extraction
基于线谱特征提取的被动声纳目标识技术研究
Research on technique of passive sonar target recognition based modulation line spectrum feature extraction
基于调制线谱特征提取的被动声呐目标识别技术研究
Supported by a project , this thesis presents the technology about passive sonar display and signal detection in design of the sonar display console
本文结合工程项目的需要，介绍了在设计被动声纳显示平台中所使用的信号检测技术和显示处理技术。