Sound Synthesis Approach for Noise Annoyance Assessment of Rotorcraft Operations

Conference paper (2013)

Authors

D Sabbatini LMS International
K Janssens LMS International
S. Hartjes Air Transport & Operations - Aerospace Engineering
H.G. Visser Air Transport & Operations - Aerospace Engineering
M Gennaretti University of Roma Tre
Giovanni Bernardini University of Roma Tre
Research Group
Air Transport & Operations (Aerospace Engineering) (TU Delft)
Copyright: © 2013 D Sabbatini, K Janssens, S. Hartjes, H.G. Visser, M Gennaretti, Giovanni Bernardini
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Published Date

2013

Language

English

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Faculty

Aerospace Engineering

Department

Control & Operations

Research Group

Air Transport & Operations

Abstract

This paper presents a sound synthesis approach that allows investigating the noise annoyance of rotorcraft in relation to the source components and flight path. The sound synthesis is based on a source-transfer-receiver model, describing the noise emission and directivity of the sources and their propagation towards the receiver point on the ground. Several noise propagation effects are considered such as the Doppler shift, distance effect, atmospheric absorption, ground reflections and the effects of head and body. A case study is presented, showing the complete modeling and synthesis procedure for a four-bladed twin-engine helicopter. The source data was obtained from numerical simulations. Flyover sounds were synthesized for a baseline trajectory and a noise-optimized flight path.