Prediction method of aircraft interior noise and validation testing

VA-one software is based on Statistical Energy Analysis theory. In this paper, acoustic modeling and prediction of interior noise of Fuselage Acoustic Research Facility (FARF) are accomplished with this software. With its support, the subsystem partition method and modeling method of airframe are proposed; further validation by testing method is also studied. With several different kinds of sidewall structures, the FARF is excited by speaker arrays and shakers while acoustic and vibration energy were measured and added into model as input. The interior damping loss factor was obtained by reverberant time measurement. Then the sound pressure level was predicted. Good coherent between prediction and measurement was obtained while methods of testing and data processing are validated. All these are very important to improve the capability of prediction of interior noise of aircraft.