Helicopter noise contour development techniques and directivity analysis
Subtitle: a preliminary report
By: by J. Steven Newman
Contributors: United States. Federal Aviation Administration. Office of Environment and Energy
Publisher: U.S. Dept. of Transportation, Federal Aviation Administration, Office of Environment and Energy; National Technical Information Service [distributor
Published: 1980
Place of publication: Washington, D.C; Springfield, Va
Language: eng
Number of pages: 38
Subjects: Helicopters -- Noise
Notes: Cover title

"September 1980."

"FAA-EE-80-41."

Includes bibliographical references