PROPAGATION OF AIRCRAFT NOISE

The major tasks undertaken were (1) analytical and laboratory experiments on the propagation of sound from sources near a flat surface of finite acoustic impedance; (2) laboratory experiments dealing with the reflection of sound from finite sized plane patches; and (3) the diffraction of sound by wedge-and trapezoidal-shape barriers. In addition, a series of measurements were made of the background noise levels for various jet flow conditions in the Anechoic Noise Facility of the Langley Research Center's Acoustic and Noise Reduction Laboratory. (Author)

• Corporate Authors:

  University of Georgia, Experiment

  Georgia Experiment Station
  Experiment, GA  United States 
• Authors:
  • Pierce, A D
  • Hadden, WJJ
• Publication Date: 1976-7

Media Info

• Pagination: 27 p.

Subject/Index Terms

• TRT Terms: Aircraft noise; Anechoic chambers; Noise; Noise control; Noise generators; Sound transmission
• Uncontrolled Terms: Noise reduction
• Subject Areas: Aviation; Environment;

Filing Info

• Accession Number: 00145822
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NASA-CR-148321 Final Rpt.
• Contract Numbers: NSG-1047
• Files: TRIS
• Created Date: Jan 16 1977 12:00AM