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Aeroacoustics research in Europe: The CEAS-ASC report on 2019 highlights, Contribution: Perception-based evaluation of auralized future low-noise aircraft concepts

Pieren, Reto und Bertsch, Lothar und Schäffer, Beat (2020) Aeroacoustics research in Europe: The CEAS-ASC report on 2019 highlights, Contribution: Perception-based evaluation of auralized future low-noise aircraft concepts. Journal of Sound and Vibration, 484 (115540), Seiten 18-19. Elsevier. doi: 10.1016/j.jsv.2020.115540. ISSN 0022-460X.

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Offizielle URL: https://doi.org/10.1016/j.jsv.2020.115540

Kurzfassung

To effectively reduce aircraft noise and its impacts on residents around airports, developments of low-noise strategies should consider the perception of sound. To that aim, a comprehensive simulation approach is pre-sented for the assessment and optimization of novel aircraft designs and flight procedures regarding perceived sound. The paper proves its feasibility by an application study on narrow-body twin-engine jet airliners. In this study, the effects of airframe modifications (e.g. landing gear mesh fairing, slat droop nose design, FOPP vortex generators), novel aircraft design, and tailored flight procedures on perceived annoyance are investigated. The key ingredient of the approach is the use of auralization for listening experiences of currently non-existing air vehicle flyovers in a virtual acoustic environment. First, aircraft and flight trajectories are designed. Second, spectral sound emission of each partial source along the flight trajectory is predicted using parametric models. Third, emission sounds are synthesized and propagated to ground-based observer locations with time-varying digital filters that simulate propagation effects such as Doppler effect, atmospheric absorption and turbulence-induced amplitude modulation. Multiple observer locations along the flight path are simulated to represent different expo-sure situations with varying noise source mixtures. The observer signals are spatialized for a hemi-spherical loudspeaker array. This allows listeners to experience the design parameters under varying operational conditions. With a psychoacoustic laboratory experiment, the changes in short-term noise annoyance to different low-noise technologies are measured. Significant annoyance reductions were found for the studied design parameters. Maximum benefit was achieved by the combined modification of the air vehicle and the flight procedure.

elib-URL des Eintrags:https://elib.dlr.de/135813/
Dokumentart:Zeitschriftenbeitrag
Zusätzliche Informationen:Kapitel 7.2
Titel:Aeroacoustics research in Europe: The CEAS-ASC report on 2019 highlights, Contribution: Perception-based evaluation of auralized future low-noise aircraft concepts
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Pieren, Retoreto.pieren (at) empa.chNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Bertsch, LotharLothar.Bertsch (at) dlr.dehttps://orcid.org/0000-0003-2780-2858NICHT SPEZIFIZIERT
Schäffer, BeatEmpa, Laboratory for Acoustics & Noise Control, Ueberlandstr. 129, CH-8600 Duebendorf, SwitzerlandNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:27 Juni 2020
Erschienen in:Journal of Sound and Vibration
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:484
DOI:10.1016/j.jsv.2020.115540
Seitenbereich:Seiten 18-19
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der HerausgeberHerausgeber-ORCID-iDORCID Put Code
NICHT SPEZIFIZIERTElsevierNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Verlag:Elsevier
Name der Reihe:Aeroacoustics research in Europe: The CEAS-ASC report on 2019 highlights
ISSN:0022-460X
Status:veröffentlicht
Stichwörter:reduced aircraft noise, low noise aircraft design,
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Hubschrauber
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L RR - Rotorcraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Der virtuelle Drehflügler (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Hubschrauber, GO
Hinterlegt von: Carter, Beatrice
Hinterlegt am:04 Sep 2020 11:08
Letzte Änderung:16 Jul 2021 09:08

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