Treated cabin acoustic prediction using statistical energy analysisThe application of statistical energy analysis (SEA) to the modeling and design of helicopter cabin interior noise control treatment is demonstrated. The information presented here is obtained from work sponsored at NASA Langley for the development of analytic modeling techniques and the basic understanding of cabin noise. Utility and executive interior models are developed directly from existing S-76 aircraft designs. The relative importance of panel transmission loss (TL), acoustic leakage, and absorption to the control of cabin noise is shown using the SEA modeling parameters. It is shown that the major cabin noise improvement below 1000 Hz comes from increased panel TL, while above 1000 Hz it comes from reduced acoustic leakage and increased absorption in the cabin and overhead cavities.
Document ID
19880035534
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yoerkie, Charles A. (Sikorsky Aircraft Stratford, CT, United States)
Ingraham, Steven T. (United Technologies Corp. Sikorsky Aircraft Div., Stratford, CT, United States)
Moore, James A. (Cambridge Collaborative, Inc. MA, United States)