Approximate method based on study of aircraft in flight and investigations of acoustics of structures; noise level in cabin is result of engine noise, aerodynamic noise, structural vibration, and noise from auxiliary units; procedure consists in determining spectrum of external noise, and decibel attenuation due to insulation of cabin; noise level obtained by subtracting attenuation loss from original level. English abstract from Recherche Ae ronautique Sept-Oct 1949. (British Edition)
Method for calculation of noise spectrum of aircraft
Engrs' Digest
Engineers' Digest ; 11 , n 2
1950
6 pages
Article (Journal)
English
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