sonar

• 利用声波探测水下目标并确定其位置的系统或设备，通常通过发射声脉冲并测量回声返回的时间来工作。

A noun referring to a system or instrument that uses sound waves to detect and locate objects underwater, typically by emitting an acoustic pulse and measuring the time it takes for the echo to return.

1. Acoustic detection systemB2formaltechnical

   A system that uses sound waves to detect and locate objects underwater by measuring the time it takes for an echo to return.

   声呐

   • The submarine used sonar to navigate through the dark waters.
   • Fishermen rely on sonar to find schools of fish.
   • Sonar technology is essential for mapping the ocean floor.

   同义词asdic