26th July 2008
A number of sites give some detailed historic information about the development of the early sound detection systems and are well worth visiting and reading.
Inventors & Inventions
IF IN DOUBT ASK !!!!
There have been a great variety of devices that used acoustic (sound) detection for ranging - ( distance and direction finding )
Checking some of these sites and images should be informative as well as fun.
Checking some of these sites and images should be informative as well as fun.
