LRAD

名词 n.
中文释义

英文释义

名词 n.
  1. Initialism of long-range acoustic device: an acoustic hailing device used to send messages and warning tones over longer distances or at higher volume than normal loudspeakers. abbreviation,alt-of,initialism
    — Since the early 1990s, long-range acoustic devices – also known as LRADs – have helped authorities control crowds of people, especially protesters. They emit a loud, painful sound over a long distance and make people run away.

词形变化

LRADs plural
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