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sonar

B2 noun

Các nghĩa

  1. sóng âm định vị dưới nước

    Artificial echolocation by use of electronic equipment, with hydrophones to locate objects underwater, using the same wave-analysis principles that radar uses.

    uncountable · usually

    They were able to detect the sunken wreck using sonar.

  2. thiết bị sonar

    A device that provides such echolocation.

    countable

    They finally bought a new sonar to replace the 40-year-old unit that sometimes didn't work right.

  3. định vị bằng tiếng vang

    Any echolocation.

    broadly · countable · uncountable

    Submarines and bats both use sonar to navigate.

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