Microphones record the sounds of the F-15EX Eagle II’s engines during a ground test Oct. 26 at Eglin Air Force Base, Fla. The aircraft underwent various ground and flight acoustic testing to create a baseline noise level for use by the Department of Defense. This was the first time this type of in-depth digital acoustic sound testing was done on any F-15 model. ( Air Force photo/Samuel King Jr.)

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Size: 3000px × 1816px
Photo credit: © APFootage / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: acoustic, eagle, eglin, f15ex, ii, test