Noise From Two-Blade Propellers
Description:
"The two-blade propeller, one of the most powerful sources of sound known, has been studied with the view of obtaining fundamental information concerning the noise emission. In order to eliminate engine noise, the propeller was mounted on an electric motor. A microphone was used to pick up the sound whose characteristics were studied electrically. The distribution of noise throughout the frequency range, as well as the spatial distribution about the propeller, was studied. The results are given…
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Date:
January 17, 1935
Creator:
Stowell, E. Z. & Deming, A. F.
Partner:
UNT Libraries Government Documents Department