在船用声呐环境中，基阵所接收的除了可能有的目标信号外，还存在本舰噪声，它对于远方的目标信号是一个强大的干扰源。
For ship mounted sonar, the transducer received not only the required signal but also the ship noise. for distant signal, the ship noise is a strong interference.
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。
Detecting sonar pulse transmitted by an active sonar, it is called "sonar pulse detection".
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