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Future Low-Noise Aircraft Technologies and Procedures - Perception-based Evaluation Using Auralised Flyovers

Pieren, Reto and Bertsch, Lothar and Lauper, Demian and Schäffer, Beat (2019) Future Low-Noise Aircraft Technologies and Procedures - Perception-based Evaluation Using Auralised Flyovers. In: 23rd International Congress on Acoustics, ICA 2019, pp. 1654-1658. 23rd International Congress on Acoustics, ICA 2019, 9.-13. Sept. 2019, Aachen. ISBN ISBN 978-3-939296-15-7 ISSN ISSN 2226-7808 and 2415-1599

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Official URL: https://www.dora.lib4ri.ch/empa/islandora/object/empa:19538

Abstract

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 and flight procedures. By means of auralisation and listening experiments, such possible future changes can be evaluated by considering human sound perception. In this study, flyovers of different aircraft types and flight procedures were auralised at multiple virtual observer locations, and subsequently evaluated in a psychoacoustic laboratory experiment with respect to short-term noise annoyance. Approaches of an existing reference aircraft, a possible low-noise retrofitted version and a future low-noise design were simulated with standard and tailored procedures. Separate source signals were synthesised for engine broadband, fan tone, airframe broadband, and cavity tone noise. Further, smooth transitions between configurations and operational conditions were modelled to create realistic sounds. To increase plausibility, the propagation simulation considered ground reflection and frequency-dependent amplitude modulation due to propagation through a turbulent atmosphere. The flyover sounds were spatially reproduced by a hemispherical loudspeaker array. The listening experiment revealed significant annoyance reductions for low-noise aircraft types and flight procedures, that maximal benefit is achieved by the combined optimization of aircraft technology and procedure, and that distributed observers need to be considered.

Item URL in elib:https://elib.dlr.de/126089/
Document Type:Conference or Workshop Item (Speech)
Title:Future Low-Noise Aircraft Technologies and Procedures - Perception-based Evaluation Using Auralised Flyovers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pieren, Retoreto.pieren (at) empa.chUNSPECIFIED
Bertsch, LotharLothar.Bertsch (at) dlr.dehttps://orcid.org/0000-0003-2780-2858
Lauper, Demiandemian.lauper (at) empa.chUNSPECIFIED
Schäffer, Beatbeat.schaeffer (at) empa.chUNSPECIFIED
Date:September 2019
Journal or Publication Title:23rd International Congress on Acoustics, ICA 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1654-1658
ISSN:ISSN 2226-7808 and 2415-1599
ISBN:ISBN 978-3-939296-15-7
Status:Published
Keywords:Aircraft design, low-noise design, noise prediction, auralization, perception-based evaluation
Event Title:23rd International Congress on Acoustics, ICA 2019
Event Location:Aachen
Event Type:international Conference
Event Dates:9.-13. Sept. 2019
Organizer:Deutsche Gesellschaft für Akustik, DEGA
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
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Winkels, Elisabeth
Deposited On:18 Sep 2019 16:52
Last Modified:18 Sep 2019 16:52

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