c. 1900-1945: Pre-radar listening devices

9 Responses

  1. Tom

    That is just insane… can you imagine the level of concentration… and the pain if someone screamed into it… lol

    Reply
  2. nick w

    try googling “Denge sound mirrors” the ultimate in 20s high-tech

    Reply
  3. Raoul

    Can you imagine if one of them farted? An atomic bomb sound for the other guy

    Reply
  4. poopoo

    Guy in pic #2 looks like Taylor Lautner. So, we know that guy wasting his life away in the ’20s with his head wedged between two giant ears at least had a rockin body (and so probably got to experience lots of great sex).

    Reply

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