c. 1900-1945: Pre-radar listening devices Chris July 17, 2011 1900-1909, War 9 CommentsFavourited 996 times Add to favourites 9 Responses Jonathan July 17, 2011 Wouldn’t you just love to toss a pebble into one of those listening horns! Reply Tom July 17, 2011 That is just insane… can you imagine the level of concentration… and the pain if someone screamed into it… lol Reply nick w July 19, 2011 try googling “Denge sound mirrors” the ultimate in 20s high-tech Reply Chris July 23, 2011 Note to Retronaut: create capsule on Sound Mirrors Reply Raoul October 3, 2011 Can you imagine if one of them farted? An atomic bomb sound for the other guy Reply Les October 21, 2011 Here’s a few sound mirrors local to me… http://www.castlekas.freeserve.co.uk/sound_mirrors.htm Reply Andrew December 1, 2011 And another well-preserved sound mirror on the island of Malta. Apparently it’s the only one of its kind outside the UK. http://www.andrewgrantham.co.uk/soundmirrors/locations/il-widna-malta/ Reply poopoo December 4, 2011 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 jonathan_reiter February 12, 2013 I need to get me one of the ones like in the picture second from the top! Reply Leave a Reply Cancel Reply Your email address will not be published. Name* Email* Website Comment Notify me of follow-up comments by email. Notify me of new posts by email.