I can hear you



This beauty posted here in our fine tradition to point to acoustic locators and aural delights.

Listening Equipment at museum "Waalsdorp"

“From the first world war until the 30’s air acoustics played an important role in the air defence. Air vehicles carrying a weapon could not be located from the ground e.g. at night time or under cloudy conditions. As radar was still to be discovered, vision had to be supplemented by hearing using the sound of the engines”.

digged by Régine at mediateletipos