Experimental aeroacoustics study on jet noise reduction using tangential air injection [PDF]
, 2011 PhDAircraft jet exhausts are a source of undesirable noise and continue to be an area of investigation driven by increasingly stringent regulation. The noise is produced by the unsteady mixing of the jet with the surrounding air and is dominated by the ...
Ahmad, Arsalan
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Trailing Edge Noise Reduction by Passive and Active Flow Controls [PDF]
, 2014 This paper presents the results on the use of porous metal foams (passive control) and dielectric barrier surface plasma actuations (active control) for the reduction of vortex shedding tonal noises from the nonflat plate type trailing edge serration in ...
Kim, JH +7 more
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Phase structure and thermal properties of bismaleimide/polyethersulfone multi-phase resin system
Journal of Aeronautical Materials, 2019 The effect of micro phase morphology of bismaleimide (BMI)/polyethersulfone (PES) multi-phase system on the thermal properties was studied by SEM, DMA and TGA.
DONG Huimin +6 more
doaj +1 more source
Noise reduction method based on generalized subtractive beamformer [PDF]
, 2006 Combating noise signals is still a very important and challenging research topic. Previously, we presented a subtractive-beam former-based noise reduction algorithm using paired microphones, which was shown to be effective in reducing directional noise ...
Li, Junfeng +3 more
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Phase Morphology and Chemorheology during Curing of Polyethersulfone/Bismaleimide Multi-phase System
Journal of Aeronautical Materials, 2018 Curing characteristic of bismaleimide (BMI)/polyethersulfone (PES) multi-phase systems was studied by differential scanning calorimetry (DSC) using the non-isothermal method under different heating rates.
DONG Huimin +6 more
doaj +1 more source
Noise Abatement Approach Using Computer Simulation Model for Urban Indian Road of a Tier-2 City
Archives of Acoustics, 2021 Noise pollution is a major problem nowadays. In urban context, road traffic is the main source of noise pollution. People directly exposed to road traffic noise suffer from moderate to severe annoyance, headache, stress, feeling of exhaustion, and ...
Dipeshkumar Ratilal SONAVIYA +1 more
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Multi-channel noise reduction in noisy environments [PDF]
, 2006 Multi-channel noise reduction has been widely researched to reduce acoustic noise signals and to improve the performance of many speech applications in noisy environments.
Li, Junfeng +5 more
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A Two-Microphone Noise Reduction Method in Highly Non-stationary Multiple-Noise-Source Environments [PDF]
, 2008 In this paper, we propose a two-microphone noise reduction method to deal with non-stationary interfering noises in multiple-noise-source environments in which the traditional two-microphone algorithms cannot function well.
SUZUKI, Yoiti +2 more
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Trailing-edge noise reduction of a wing by a surface modification
, 2021 There is an increased emphasis on reducing airframe noise in the last decades. Airframe noise is sound generated by the interaction of a turbulent flow with the aircraft geometry, and significantly contributes to the overall noise production during the ...
Kozulovic, Dragan +2 more
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Research on Noise Generation Mechanism and Noise Reduction Ball Valve Measures of Ball Valve
IEEE Access, 2020 Ball valve is the core control component for flow in HVAC (Heating, Ventilation and Air Conditioning) system. And valve's flow noise is one of the key parameters to evaluate its performance.
Jin Zhang +4 more
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