MAIN TEST CHAMBER SONIC FATIGUE FACILITY
FOAM - Cutaway drawing shows layout of main test chamber in world's largest sonic fatigue facility, Wright-Patterson Air Force Base, Dayton, Ohio.
Left side of drawing shows anechoic treatment (polyurethane foam manufactured by the Foam Division, Scott Paper Company) in extended position.
On right side of drawing, treatment is collapsed and drawn up so that the chamber can be operated for reverberation tests.
A bank of 25 low-frequency sirens will be mounted in the corner.
A semi-portable bank of nine high frequency sirens will be in the chamber.
Single, portable, high frequency and low-frequency sirens will also be installed inside the chamber.