Results 11 to 20 of about 1,970,340 (307)
Aerospace, 2022 Compliance with environmental protection regulations, in particular, community noise requirements, constitutes one of the major obstacles for designing future supersonic civil aircraft.
Victor F. Kopiev +4 more
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System Noise Assessment and Uncertainty Analysis of a Conceptual Supersonic Aircraft
Aerospace, 2022 This paper describes a system noise assessment of a conceptual supersonic aircraft called the NASA 55t Supersonic Technology Concept Aeroplane (STCA), its prediction uncertainty, and related validation tests.
Junichi Akatsuka, Tatsuya Ishii
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Aerospace, 2021 The German Aerospace Center has launched an internal project to assess the noise impact associated with supersonic transport aircraft during approach and departure.
Michel Nöding +6 more
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Device-independent characterization of quantum instruments [PDF]
Quantum, 2020 Among certification techniques, those based on the violation of Bell inequalities are appealing because they do not require assumptions on the underlying Hilbert space dimension and on the accuracy of calibration methods.
Sebastian Wagner +3 more
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Vehicle Impact on Tire Road Noise and Validation of an Algorithm to Virtually Change Tires
Applied Sciences, 2022 Especially for electric vehicles, the tire impact on car noise is becoming more and more important. The requirement of meeting certification criteria makes estimating the sound pressure level essential for vehicle manufacturers.
Michael Leupolz, Frank Gauterin
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Conceptual estimation of the noise reduction potential of electrified aircraft engines★
Acta Acustica, 2023 The advent of electrified propulsion systems for civil aircraft promises not only notable reductions of CO2 and NOx emissions, but also of perceived noise.
Geyer Thomas F., Enghardt Lars
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Multiobjective optimisation of flight paths for noise level mitigation and sound quality improvement
Noise Mapping, 2021 The present work deals with the multiobjective, multidisciplinary optimisation of takeoff and approach operations of a commercial aircraft aimed at the mitigation of the impact of aviation noise on the population.
Centracchio Francesco +2 more
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Disruptive Technologies Certification Standard Approach
Aerospace, 2023 The current rapid technological change identifies the evolution of people’s transportation as one of the primary effects. Hybrid-electric propulsion reveals potential advantages, including fuel savings, lower pollution, and reduced noise emissions. It is
Gianpiero Buzzo +7 more
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Technologia i Automatyzacja Montażu, 2023 Construction machinery noise emission and vibration on the operator sitearethe most important harmful factors having impact on human health. Theyaffect for people working on the operators andas well as otherpersons around the machine.
Janusz Kobiałka, Andrzej Barszcz
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Propulsion - New Perspectives and Applications [Working Title], 2021 The reduction of the cumulative noise level at certification points applying to the supersonic civil aeroplane is estimated in the paper. The reduction is obtained by using an programmed thrust management with Programmed Lapse Rate based on the variation
Mirzoyan Artur, Khaletskii Iurii
semanticscholar +1 more source