
And of course the horrible reality

not to mention....

The dreaded Mosquito!! and its clever subversion. clicky to find out more
professor meyer's topophone was one of the earliest working acoustic location devices in 1880, the theory behind this was eventualy put to use on the Japanese War Tubas pictured below which could pick up the rumble of aircraft at great distances until radar was invented circa WW2
This guys called harry partch and he's made quite a few
and here is the worlds largest instrument at 3.5 acres constructed by Leland W. Sprinkle, this is up on oddmusic.com which is fantastic for these things.