An analytical model based on modal analysis was developed to predict the noise transmission into a twin-engine light aircraft. The model was applied to optimize the interior noise to an A-weighted level of 85 dBA. To achieve the required noise attenuation, add-on treatments in the form of honeycomb panels, damping tapes, acoustic blankets, septum barriers and limp trim panels were added to the existing structure. The added weight of the noise control treatment is about 1.1 percent of the total gross take-off weight of the aircraft.
Study of Cabin Noise Control for Twin Engine General Aviation Aircraft
1982
147 pages
Report
Keine Angabe
Englisch
Aircraft , Noise Pollution & Control , Aircraft compartments , Aircraft noise , General aviation aircraft , Noise prediction (Aircraft) , Noise propagation , Noise reduction , Propeller blades , Acoustic simulation , Dynamic structural analysis , Honeycomb structures , Modal response , Panels , Vibration damping , Walls
Cabin Pressure Control Systems for General Aviation Aircraft
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