This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Evaluation of Aircraft Internal Noise
Annotation ability available
Sector:
Language:
English
Abstract
From the standpoint of marketing as well as safety, control of aircraft interior noise is of considerable interest to the manufacturers of business aircraft. The interior acoustics engineer in the industry, having no fund of accumulated experience or research to draw from in the industry itself, has to piece together a working design procedure from a knowledge of boundary-layer theory, jet noise, random vibrations, and architectural acoustics to meet an acceptable cabin noise criterion for the small aircraft. In this paper, methods are outlined to calculate the cabin noise levels due to the three main noise sources-the boundary-layer pressure fluctuations, jet exhaust, and internal equipment. Formulas for quick estimation of overall noise levels due to these sources as well as methods to obtain octave band levels are given. The paper also discusses manufacture or service-related noises and methods for identifying their sources.
Recommended Content
Authors
Citation
Ganesan, N., "Evaluation of Aircraft Internal Noise," SAE Technical Paper 740360, 1974, https://doi.org/10.4271/740360.Also In
References
- Ganesan N. “An Analysis of Cabin Noise Levels in 707 and 727 Airplanes.” Boeing Document D6-24485 October 1969
- Wilby J. F. et al. “A Study of the Pressure Fluctuations in the Turbulent Boundary Layer on the B-52H Aircraft.” Boeing Document D6-20608 TN December 1969
- Ribner H. S. “Boundary Layer Induced Noise in the Interior of Aircraft.” UTIA Report No. 37 April 1956
- Franken Peter A. Kerwin, E. M. Jr. Staff of B. B. & N. “Methods of Flight Vehicle Noise Prediction.” WADC Tech. Report 58-343 November 1958
- ASHRAE “Handbook of Fundamentals.”
- Graham J. Barrie “How to Estimate Fan Noise.” Sound and Vibration May 1972
- Green J. S. Toney B. W. “Acoustics Monitoring of Airframe Structural Proof-Testing.” Jrl. of Environmental Sciences January-February 1972
- Hewlett-Packard “Acoustics Handbook.” November 1968