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.
- Prepared for SAE Meeting 28 Feb-4 March, 1977.
Warrendale, PA United States 15096
- Mixson, J S
- Vaicaitis, R
- Barton, C K
- Publication Date: 1977
- Features: References;
- Pagination: 12 p.
- TRT Terms: Acoustics; Aircraft; Aircraft cabins; Aircraft noise; Cavitation noise; Engines; Fuselages; Mathematical models; Measurement; Noise control; Private aircraft; Propeller driven aircraft; Small aircraft
- Uncontrolled Terms: Aircraft engines; Models; Noise reduction
- Old TRIS Terms: Acoustic variables measurement
- Subject Areas: Aviation; Vehicles and Equipment;
- 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