NOISE CERTIFICATION CONSIDERATIONS FOR HELICOPTERS BASED ON LABORATORY INVESTIGATIONS

This is the second part of a program concerning noise certification for V/STOL and helicopter aircraft. Aspects considered were: an engineering calculation procedure which validly and reliably reflects annoyance to helicopter operations; estimates of noise exposure levels which could be compatible with human activities in areas surrounding heliports; noise exposure modeling for helicopter noise; certification measurement approaches for helicopter noise certification. The basics of the program involved human response evaluations of conventional takeoff and landing (CTOL) aircraft noise, simulations of helicopter noise emphasizing 'slap' or pulsating noise effects, and recordings of a wide variety of helicopter operations.

• Supplemental Notes:
  • See also report dated Nov 75, AD-A018 036.
• Corporate Authors:

  MAN-Acoustics and Noise, Incorporated

  2105 North 45th Street
  Seattle, WA  United States  98103
• Publication Date: 1976-7

Media Info

• Pagination: 108 p.

Subject/Index Terms

• TRT Terms: Acoustic measuring instruments; Acoustics; Aircraft noise; Analysis of variance; Certification; Communities; Environmental protection; Health hazards; Helicopters; Human factors engineering; Laboratory tests; Mathematical models; Noise; Public relations; Simulation; Sound level; Statistical analysis; STOL aircraft
• Uncontrolled Terms: Experimental data; Intensity; Models
• Old TRIS Terms: Acoustic measurement; Noise certification criteria; Short takeoff aircraft
• Subject Areas: Aviation; Data and Information Technology; Education and Training; Environment; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00145528
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-RD-76-116 Final Rpt., MAN-1014
• Contract Numbers: DOT-FA74WAI-490
• Files: NTIS, TRIS
• Created Date: Jan 16 1977 12:00AM