Noise Control of Mock-Scale ChamberCore Payload Fairing Using Integrated Acoustic Resonators

摘要

The noise control of a cylindrical ChamberCore payload fairing, which has an integrated T-shaped acoustic resonator network, is experimentally investigated. It is demonstrated that structurally integrated acoustic resonators can provide noise control of 3.2-6.0 dB at the targeted low acoustic modes for the ChamberCore fairing. Improvements up to 4.9 dB are also observed in some nontargeted frequencies due to modal coupling. The integrated acoustic resonators offer advantages for noise control in small enclosures due to space savings and the simultaneous improvement of the structural and acoustic boundary conditions.