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Improving Future Low-noise Aircraft Technologies Using Experimental Perception-Based Evaluation of Synthetic Flyovers

Pieren, Reto and Bertsch, Lothar and Lauper, Demian and Schäffer, Beat (2019) Improving Future Low-noise Aircraft Technologies Using Experimental Perception-Based Evaluation of Synthetic Flyovers. Science of the Total Environment, 692, pp. 68-81. Elsevier. doi: 10.1016/j.scitotenv.2019.07.253. ISSN 0048-9697.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://doi.org/10.1016/j.scitotenv.2019.07.253


Residents living in the vicinity of airports are exposed to noise from departing and approaching aircraft. Noise may be reduced by introducing novel aircraft technologies into vehicle retrofit, aircraft design and flight procedures. Nowadays, noise assessment and communication of noise are accomplished using conventional noise indicators that consider neither the perception of sound, nor its health effects. To overcome these limitations, this article presents a more comprehensive approach that supports the movement for perception-influenced design in order to reduce the negative environmental impacts and adverse health effects caused by increased air traffic noise. By means of auralization (the acoustical counterpart of visualization), possible future changes can be evaluated by considering the human perception of sound. In this study, in a virtual acoustic environment flyovers of different aircraft types and flight procedures are auralized for ground-based receiver locations, and subsequently evaluated in a psychoacoustic laboratory experiment with respect to short-term noise annoyance. Flight approaches of an existing reference aircraft, a possible low-noise retrofitted vehicle and a future low-noise vehicle design were simulated along standard and tailored flight procedures. To create realistic listening experiences of synthetic flyovers, auralization technologies were further developed regarding source synthesis, transitions between aircraft conditions, sound propagation effects and immersive sound reproduction. Listening experiments revealed significant annoyance reductions for low-noise aircraft types and tailored flight procedures, and that maximum benefit is achieved by the combined optimization of aircraft design and flight procedure. Further, it is shown that spatially distributed receivers need to be considered for a reliable low-noise aircraft technology evaluation. The reduction potential in terms of perceived noise by retrofitting current vehicles and designing new vehicle architectures is thus demonstrated. These findings suggest applying the proposed comprehensive approach to effectively reduce the impact of perceived air traffic noise in the future.

Item URL in elib:https://elib.dlr.de/126086/
Document Type:Article
Title:Improving Future Low-noise Aircraft Technologies Using Experimental Perception-Based Evaluation of Synthetic Flyovers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Bertsch, LotharUNSPECIFIEDhttps://orcid.org/0000-0003-2780-2858UNSPECIFIED
Date:17 July 2019
Journal or Publication Title:Science of the Total Environment
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 68-81
EditorsEmailEditor's ORCID iDORCID Put Code
Keywords:Aircraft noise, simulation, auralization, sound synthesis, perception, listening experiment, low-noise aircraft design
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Winkels, Elisabeth
Deposited On:25 Jul 2019 10:24
Last Modified:06 Sep 2019 15:19

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