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Sound Quality Assessment of a Novel Medium-range Aircraft in the Context of a Sustainable and Energy Efficient Aviation

Greco, Gil F. and Bertsch, Lothar and Ring, Tobias P. and Langer, Sabine C. (2020) Sound Quality Assessment of a Novel Medium-range Aircraft in the Context of a Sustainable and Energy Efficient Aviation. Deutscher Luft- und Raumfahrtkongress 2020 (virtuell), 01.-03. Sep. 2020, Virtuell (Aachen).

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Official URL: https://dlrk2020.dglr.de/

Abstract

In the context of the Cluster of Excellence SE2A- Sustainable and Energy-Efficient Aviation, future technologies for a sustainable and eco-friendly air transport system are being investigated. This task requires not only the development of alternative fuel concepts and novel vehicle technologies but also the definition of appropriate assessment strategies. Regarding noise, the assessment should reflect the situation of communities living near airports, i.e. not only addressing noise levels but also accounting for the annoyance caused by aircraft noise. For this purpose, conventional A-weighted sound pressure level metrics provide initial but limited information as the level- and frequency-dependency of the human hearing is accounted for in a simplified manner. Ideally, subjective evaluations are required to adequately evaluate the perceived short-term annoyance associated to aircraft noise. However, this is a rather time-consuming approach to be applied during the conceptual aircraft design stage, where a large solution space needs to be explored. Aiming at bridging this gap, this work presents a methodology for the automated sound quality assessment of aircraft under conceptual design, which is hereby conducted in terms of objective psychoacoustic metrics. The proposed methodology is applied to a novel medium-range vehicle with fan noise shielding architecture during take-off and landing procedures. The relevance of individual sound sources, i.e. airframe and engine noise contribution, and their dependencies on the aircraft architecture and flight procedures are assessed in terms of the proposed sound quality metrics (SQM). Furthermore, the methodology is steered towards community noise assessment, where the impacts on short-term annoyance brought by the novel aircraft design are evaluated in terms of the modified psychoacoustic annoyance, a metric that provides a quantitative description of human annoyance as a combination of different hearing sensations. The present work is understood as an essential step towards low annoyance aircraft design.

Item URL in elib:https://elib.dlr.de/135905/
Document Type:Conference or Workshop Item (Speech)
Additional Information:nur Vortrag.
Title:Sound Quality Assessment of a Novel Medium-range Aircraft in the Context of a Sustainable and Energy Efficient Aviation
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Greco, Gil F.g.felix-greco (at) tu-braunschweig.deUNSPECIFIED
Bertsch, LotharLothar.Bertsch (at) dlr.dehttps://orcid.org/0000-0003-2780-2858
Ring, Tobias P.t.ring (at) tu-braunschweig.deUNSPECIFIED
Langer, Sabine C.s.langer (at) tu-braunschweig.deUNSPECIFIED
Date:3 September 2020
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aircraft noise; Environmental acoustics; Sound quality; Noise annoyance; Community noise; PANAM; Cluster of Excellence SE2A – Sustainable and Energy-Efficient Aviation
Event Title:Deutscher Luft- und Raumfahrtkongress 2020 (virtuell)
Event Location:Virtuell (Aachen)
Event Type:national Conference
Event Dates:01.-03. Sep. 2020
Organizer:Deutsche Gesellschaft für Luft- und Raumfahrt (DGLR)
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 , other
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Carter, Beatrice
Deposited On:08 Dec 2020 09:55
Last Modified:08 Dec 2020 09:55

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