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The first flight surgeon in the pioneer Army Air Service of 1918, Dr. Robert J. Hunter, tries out a newfangled noise-measuring gadget on a jet fighter at Randolph Field, Texas. Demonstrating the instrument is Lt. Col. James E. Lett (left), head of the School of Aviation Medicine’s Ear-Nose-Throat department, 1959. (Photo courtesy of the National Archives and Records Administration)
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