The effectiveness of the EPNL procedure in quantifying helicopter blade slap and tail rotor noise heard on approach some distance from the flyover position is addressed. Alternative methods of rating helicopter noise are reviewed including correction procedures to the EPNL concept which account for blade slap and tail rotor noise. The impact of the use of such corrections is examined.
Rating helicopter noise
1978-08-01
Conference paper
No indication
English
Instrument rating (helicopter) written test guide
SLUB | 1968
|Engineering Index Backfile | 1965
|NTRS | 1983
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