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Engine Nacelle Noise Prediction and Trades
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English
Abstract
The object of engine nacelle noise prediction is to use aircraft sound data measured at a test site or measured from flyover data and estimate the noise level as a function of time at other hypothetical observer locations.
The simulation consists of applying attenuation corrections to the input sound pressure spectra to obtain the projected spectra as a function of time.
The effect of acoustic noise suppression can be analyzed by examining the influence of each noise source on the total noise spectra.
Trade studies can be conducted by constructing lines of constant annoyance for aircraft landing, takeoff, or fly-by.
Authors
Citation
Veldman, H., "Engine Nacelle Noise Prediction and Trades," SAE Technical Paper 710386, 1971, https://doi.org/10.4271/710386.Also In
References
- Pinker R. A. “Mathematical Formulation of the NOY Tables,” Tr. Sound Vibration 1968 8 488 493
- Federal Aviation Regulation III Noise Standards: Aircraft Type Certification Dec. 1969
- Galloway W. J. Bishop D. E. “Noise Exposure Forecasts Evolution, Evaluation, Extensions and Land Use Interpretation,” August 1970
- SAE Aerospace Recommended Practice (ARP) 866 “Standard Values of Atmospheric Absorption as a Function of Temperature and Humidity for Use in Evaluating Aircraft Flyover Noise,” SAE Committee A-21 August 31 1964
- SAE Aerospace Information Report (AIR) 923 “Method for Calculating the Attenuation of Aircraft Ground to Ground Noise Propagation During Take-off and Landing,” SAE Committee A-21 August 15 1966
- Technical Note D6-17095 TN “Doppler Effect Correction for Motions of Source, Observer and Fluid,” The Boeing Co. Mangiarotty R. A. November 21 1966