aeroacoustics
noun, plural in form but singular in construction
aer·o·acous·tics ˌer-ō-ə-ˈkü-stiks 
: the study of the generation and propagation of sound specifically in an atmosphere
Hartvigsen said Dr. Ford's visit was significant to him in another way. "I have been involved in some of the tests of the shuttle external tank hardware that were performed at AEDC over the last several years," he explained. "I have some knowledge of aeroacoustics, vibration and the associated hardware that came in handy for the NASA shuttle tests." 
U.S. Federal News, 27 Mar. 2009
U.S. Federal News, 27 Mar. 2009 also : the acoustic properties or qualities of something (such as a physical system) in an atmosphere
The first of two planned projects focuses on the aeroacoustics of cyclone separators—complex 3D flows that swirl about a central column of fluid in line with the axis of rotation. Andrew Czyzewski, The Engineer, 28 Mar. 2011
Andrew Czyzewski, The Engineer, 28 Mar. 2011 aeroacoustic
ˌer-ō-ə-ˈkü-stik
adjective The previous work included propulsion/airframe aeroacoustic integration and experimentation with jet engine integration with traditional tube/wing and blended wing-body aircraft configurations, says NASA. Flight International, 10 Nov. 2009
Flight International, 10 Nov. 2009 
Word History
Etymology
aero- + acoustics
First Known Use
1971, in the meaning defined above
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