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1. Oxford Dictionary

   sonar

   • IPA[ˈsəʊnɑː]

   英式

   • n.
     a system for the detection of objects under water by emitting sound pulses and detecting or measuring their return after being reflected；an apparatus used in sonar

   • noun: sonar, plural noun: sonars

2. • 釋義

   n.

   名詞

   • 1. a system for the detection of objects under water by emitting sound pulses and detecting or measuring their return after being reflected a weak sonar signal
   • ▪ an apparatus used in sonar we reduced the sensitivity of our scanning sonars
   • ▪ the method of echolocation used in air or water by animals such as whales and bats the fishing nets are detectable by dolphin sonar
3. • 更多解釋

   sonar

   • IPA[ˈsōˌnär]

   美式

   • n.
     a system for the detection of objects under water and for measuring the water's depth by ... a weak sonar signal

   Oxford American Dictionary