L-1011 Engine: RB.211 Noise Supression

The majority of the engine noise originates front he LP compressor. Noise suppression materials are used in the areas: on the inner skin of the nose cowl, on the inside of the LP compressor casings, on the inside of the thrust reverser folding flaps, on the inside of the LP compressor duct forming the exterior surface of the gas nozzle generator fairings within the exhaust transition case. Many of these items add to the very unique sound of the RB.211