INTERIOR NOISE ANALYSIS AND CONTROL FOR LIGHT AIRCRAFT

This paper describes experimental and analytical studies of the interior noise of twin-engine, propeller-driven, light aircraft. Experimental results indicate that interior noise levels due to propeller noise can be reduced by reduction of engine rpm at constant airspeed (about 3 dB), by synchronization of the twin engines/propellers (up to 12 dB), and by increasing the distances from propeller tip to fuselage. The analytical model described uses modal methods and incorporates the flat-sided geometrical and skin-stringer structural features of light aircraft. Initial results show good agreement with measured noise transmitted into a rectangular box through a flat panel.

  • Supplemental Notes:
    • Prepared for SAE Meeting 28 Feb-4 March, 1977.
  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Mixson, J S
    • Vaicaitis, R
    • Barton, C K
  • Publication Date: 1977

Media Info

  • Features: References;
  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00170197
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: SAE 770445 Preprint
  • Files: TRIS
  • Created Date: Jan 30 1978 12:00AM