Figure 15
1935-MODEL SOUND LOCATOR
Development of heat or radio detection equipment was made urgent by the breakdown of sound location at maneuvers of Army antiaircraft and Air Corps units in 1933 and 1936. This photograph shows a sound locator used at First Army Maneuvers, Pine Camp, New York, in August 1935.
Signal Corps Photo 103030
Actually found this from the Chinese language wiki article:
http://zh.wikipedia.org/wiki/聲音測位器
The caption on Shorpy is "Amplifiers at Bolling Field, 1921." Bolling Air Force Base is in Washington, DC, USA. Perhaps these are more American war tubas.
Comments to this entry
Curzon
April 13, 2008
1:27 pm
Lexington Green
April 13, 2008
11:48 pm
Darin
April 14, 2008
9:10 am
http://www.infoage.org/Dav-1-fig15.html
http://www.infoage.org/dav-1i-f15.jpg
Actually found this from the Chinese language wiki article:
http://zh.wikipedia.org/wiki/聲音測位器
Wagar
April 15, 2008
1:33 am