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14th February 2016 | 17:57

#5 (permalink)

Turbine D

Joined: Dec 2010

Posts: 1,165

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From: Middle America

Supporting what RVF750 said, The perforations help to reduce the jet engine's fan noise by damping the energy response from the fan while directing the sound into a sound absorbing material, generally in the form of a honeycomb structure.

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