Simulation of rotary and fixed wing flyover noise for subjective assessments.

Subjective assessments of noise from aircraft flight operations require time histories of acoustic pressure at listener positions. Synthesized sound has an advantage over recordings by allowing the examination of proposed aircraft, flight procedures, and other conditions or configurations for which recordings are unavailable. Previous work by the authors [J. Acoust. Soc. Am. 113, 2245 (2003); 114, 2340 (2003); 116 2515 (2004)] focused on the development of a two‐stage process for simulating flyover noise. The first stage entailed synthesizing the time histories at the flying source based on predictions of the source directivity. A second real‐time rendering stage entailed propagation to a listener position on the ground, with binaural playback over headphones. More recently, loudspeaker based rendering was implemented for three‐dimensional presentation in the NASA Langley Exterior Effects Room [J. Acoust. Soc. Am. 128, 2482 (2010); POMA 9, 015004 (2010)]. This paper discusses recent developments to the sy...