On the appropriateness of applying chi-square distribution based confidence intervals to spectral estimates of helicopter flyover data
By: Charles K. Rutledge.
Contributors: Langley Research Center.
Series: NASA contractor report -- 181692.; NASA contractor report -- NASA CR-181692.
Publisher: National Aeronautics and Space Administration, Langley Research Center
Published: 1988
Place of publication: Hampton, Va
Language: eng
Format: Microform
Subjects: Helicopters -- Noise -- Mathematical models.
Notes: Distributed to depository libraries in microfiche.

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