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Acoustic testing
Microphones record the sounds of the F-15EX Eagle IIs engines during a ground test at Eglin Air Force Base, Fla., Oct. 26, 2022. The aircraft underwent various ground and flight acoustic testing to create a baseline noise level for use by the Department of Defense. (U.S. Air Force photo by Samuel King Jr.)

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Photo by: Samuel King Jr. |  VIRIN: 221026-F-F3962-9201.JPG