Helicopter main-rotor speed effects on far-field acoustic levels
By: Arnold W. Mueller, Otis S. Childress, and Mark Hardesty.
Contributors: Childress, Otis S.; Hardesty, Mark.; Langley Research Center.
Series: NASA technical memorandum -- 100512
Publisher: National Aeronautics and Space Administration, Langley Research Center, [Springfield, Va.; National Technical Information Service, distributor
Published: 1987
Place of publication: Hampton, Va
Language: eng
Format: Microform
Number of pages: 18
Subjects: Rotors (Helicopters) -- Noise.; Far fields.; Helicopters.; Noise intensity.; Rotor speed.
Other titles: Helicopter main rotor speed effects on far-field acoustic levels
Notes: Cover title.

"October 1987."

Includes bibliographical references (p. 8).

Microfiche. [Washington, D.C.? : National Aeronautics and Space Administration, 1988] 1 microfiche : negative.