Twenty Thousand Hertz

Sonic Weapons: How “sound cannons” are used for control

Mar 10, 2021
Guest
Michele Lindor
Guest
Lynne Peskoe-Yang
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ANECDOTE

Michelle Lindor's L-Rad Experience

  • Michelle Lindor experienced intense, painful sound from an L-Rad at a protest that caused lasting ear ringing and discomfort.
  • She fought through the pain to stay at the protest but suffered symptoms lasting nearly a week afterward.
INSIGHT

How L-Rads Work

  • The L-Rad is a device that focuses sound in a narrow beam, functioning both as a loudspeaker and a weapon.
  • Its deterrent tone is a loud, focused sound designed to cause discomfort, unlike regular loudspeakers that scatter sound broadly.
INSIGHT

L-Rads' Original Military Use

  • L-Rads were originally designed for military communication over long distances at sea.
  • They can transmit messages clearly over two miles, useful for naval and emergency situations like wildfires or disaster evacuations.
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