The Status of Rotor Noise Technology

Abstract
In the last two decades, rotor noise prediction has grown into a science called Rotor Noise Technology. This transformation has been due to many reasons, not the least of which has been the growing interest of the aerodynamicist in rotor acoustics. This paper will attempt to establish the state of the technology by first identifying the various characteristics of rotor noise and then assessing the state of technology in understanding and predicting the most important rotor noise characteristics in a real‐world environment.

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