Review of Aircraft Noise Propagation

Putnam, Terrill W. (1975) Review of Aircraft Noise Propagation. Technical Report NASA TM X-56033, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

This paper reviews the current state of knowledge about the propagation of aircraft noise. The literature on the subject is surveyed and methods for predicting the most important and best understood propagation effects are presented. The available empirical data are examined and the data's general validity is assessed. The methods used to determine the loss of acoustic energy due to uniform spherical spreading, absorption in a homogeneous atmosphere, and absorption due to ground cover are presented. A procedure for determining ground-induced absorption as a function of elevation angle between source and receiver is recommended. Other factors that affect propagation, such as refraction and scattering due to turbulence, which were found to be less important for predicting the propagation of aircraft noise, are also evaluated.

EPrint Type:	NASA Technical Memorandum
Keywords:	Noise propagation, Aircraft noise
Subjects:	Not Categorized
ID Code:	732
Deposited On:	15 Febuary 2006
Additional Information:	60 pages.