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On the influence of trailing-edge serrations on open-rotor tonal noise
18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference), 2012Tonal noise of contra-rotating open rotors can be divided into self and interaction noise. The latter can be subdivided into potential field interaction noise, noise due to the interaction of the front-rotor wakes with the aft-rotor blades and tip vortex interaction noise.
Weckmüller, Ch., Guerin, S.
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Tonal noise reduction of an electric ducted fan using over-the-rotor acoustic treatment
Applied Acoustics, 2023Tingsheng Zhong, Cheng Yang, M. Åbom
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Tonal Noise Control using Rotor Phase Synchronization
Proceedings of the Vertical Flight Society 75th Annual Forum, 2019The purpose of this study is to determine if phase synchronization can be used to reduce the net radiated sound power from two rotors. Phase synchronization implies that the rotors have the same rotational speed with a fixed relative azimuthal blade ...
N. Schiller +2 more
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Effect of skew on the tonal noise characteristics of a full-scale submarine propeller
Ocean Engineering, 2023Kukhwan Yu +5 more
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Active Control of Tonal and Broadband Noise
2012Active reduction of disturbing noise requires the generation of appropriate control signals in order to drive the canceling sources. For this purpose we have to organize the signal processing of data provided by sensors. These data contain information about the disturbance as well as about the systems state.
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Active noise control of aircraft engine discrete tonal noise
The Journal of the Acoustical Society of America, 1997An active noise control subassembly for an aircraft engine. An aircraft engine noise radiating panel is bendably vibratable to generate a canceling noise generally opposite in phase to at least a portion of the discrete tonal noise produced by the engine. A piezoceramic actuator plate is vibratable by an applied electric AC signal.
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Neural fixed-parameter active noise controller for variable frequency tonal noise
Neurocomputing, 2013Sound emitted by audible warning devices for emergency vehicles usually exceeds maximum admissible rates of noise in the aspect of occupational health and safety of the crew inside. Therefore, the idea of active noise control systems for emergency vehicles is an important issue. Most of active noise control systems for emergency vehicles developed till
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Abatement of a Multi-Rotor Tonal Noise Component with Phase Control Technology
Advanced Courses, 2022Ofek Hertzman +2 more
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Automated Classification of Dugong Calls and Tonal Noise by Combining Contour and MFCC Features
Acoustics Australia, 2021Kotaro Tanaka +4 more
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