This sounder enables non-barometric determination of altitude by night or in fog which functions on acoustic principle of water sounder, the sound waves passing from airship to ground and return. Translated from German. See description in German in Berichte u. Abhandlungen der Wissenschaftlichen Gesellschaft fur Luftfahrt, no. 13, May 1926, pp. 56-75, 35 figs.
Behm acoustic sounder for aircraft
Nat. Advisory Committee Aeronautics -- Tech. Memorandums
1926
5 pages
3 Figs. on Supp. plates
Report
Englisch
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Behm Acoustic Sounder for Aircraft
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