Noise Encountered in Rotary-Wing Aircraft | Zendy

Donald C. Gasaway | Zendy

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Noise Encountered in Rotary-Wing Aircraft

Author(s) -

Donald C. Gasaway

Publication year - 1970

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.1973993

Subject(s) - noise (video) , acoustics , wing , rotor (electric) , interference (communication) , aircraft noise , power (physics) , computer science , aerospace engineering , automotive engineering , physics , engineering , noise reduction , telecommunications , electrical engineering , quantum mechanics , artificial intelligence , image (mathematics) , channel (broadcasting)

The acoustic environment encountered within rotary‐wing aircraft constitutes a mixture of several noise‐generating mechanisms. Primary and secondary noise‐producing mechanisms that are associated with the ground and airborne operation of rotary‐wing aircraft are identified, described, and illustrated. Some of the noise sources studied include main rotor(s), antitorque rotor, main and secondary transmission and gear‐shaft distribution systems, and auxiliary power units. In addition to reporting specific noise generators, composite noise envelopes are provided, which illustrate typical noise environs found within rotary‐wing vehicles with different configurations of rotor‐power plant matings. Alterations in internal noise that occur during conditions of hover and forward flight are described, and aeromedical factors such as speech interference and potential auditory risk are identified.

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