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Synthesis of helicopters noise for sound quality analysis
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
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2007 (English)In: 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), 2007Conference paper (Refereed)
Abstract [en]

This paper presents a model-based sound synthesis approach for flyover and interior noise of aircraft, with special focus on helicopters. The research is aimed at the development of technology and tools to support a more environmental friendly design of modern helicopters thus facilitate a better exploitation of helicopters in regional transportation. The synthesis of helicopter noise is based on a Sound Quality Equivalent model that is extracted from sound recordings. A thorough noise analysis allows identifying and extracting the most relevant noise components. The sound synthesis model is then implemented as compact and sound quality accurate model consisting of a superimposition of rpm dependant tonal components, one third octave noise bands to characterize the broadband noise and interference pattern. The noise feature extraction process from recorded data and the sound synthesis are illustrated. The resulting noise models are validated for a number of typical helicopter sounds. The potential for using this technology approach to target sound design is briefly discussed.

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Other Engineering and Technologies
URN: urn:nbn:se:kth:diva-154718ScopusID: 2-s2.0-84884753688ISBN: 978-162410003-1OAI: diva2:758322
13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), 21 May 2007 through 23 May 2007, Rome, Italy

QC 20141027

Available from: 2014-10-27 Created: 2014-10-27 Last updated: 2014-10-27Bibliographically approved

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Fromell, Jessica
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