Sound-Level Measurements of a Light Airplane Modified to Reduce Noise Reaching the Ground
Description:
"An Army liaison-type airplane, representative of personal airplanes in the 150 to 200 horsepower class, has been modified to reduce propeller and engine noise according to known principles of airplane-noise reduction. Noise-level measurements demonstrate that, with reference to an observer on the ground, a noisy airplane of this class can be made quiet -- perhaps more quiet than necessary. In order to avoid extreme and unnecessary modifications, acceptable noise levels must be determined" (p. …
more
Date:
February 12, 1948
Creator:
Vogeley, A. W.
Item Type:
Refine your search to only
Report
Partner:
UNT Libraries Government Documents Department