ACAT1 Benchmark of RANS-Informed Analytical Methods for Fan Broadband Noise Prediction—Part I—Influence of the RANS Simulation [PDF]
Acoustics, 2020 A benchmark of Reynolds-Averaged Navier-Stokes (RANS)-informed analytical methods, which are attractive for predicting fan broadband noise, was conducted within the framework of the European project TurboNoiseBB.
Carolin Kissner +11 more
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Broadband spectroscopy of quantum noise
Physical Review ACharacterizing noise is key to the optimal control of the quantum system it affects. Using a single-qubit probe and appropriate sequences of $π$ and non-$π$ pulses, we show how one can characterize the noise a quantum bath generates across a wide range of frequencies -- including frequencies below the limit set by the probe's $\mathbb{T}_2$ time. To do
Yuanlong Wang, Gerardo A. Paz-Silva
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Aero-acoustical Study of Axial Fan using Computational Fluid Dynamics [PDF]
Journal of Agricultural Machinery, 2020 Introduction The issue of noise pollution is one of the concerns of most societies and industries because of their relationship to the environmental comfort of life or work of people are paying attention. The Aero-acoustics not only because of government
B Sabralilou +3 more
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Review of Control Technologies for Quiet Operations of Advanced Air-Mobility
Applied Sciences, 2023 The current technologies for developing quiet rotor noise in urban canyons are reviewed. Several passive noise control approaches are discussed with their limitations in reducing both tonal and broadband noise.
Samuel Afari +3 more
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A semi-adaptive feedforward hybrid active noise control algorithm for multichannel systems [PDF]
JASA Express LettersBroadband active noise control systems incorporating fixed controllers exhibit limited ability to reduce sinusoids. This study presents a semi-adaptive feedforward hybrid active noise control (HANC) system to address this issue. The proposed system pairs
Shengnan Cao +3 more
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A non-invasive, quantitative study of broadband spectral responses in human visual cortex. [PDF]
PLoS ONE, 2018 Currently, non-invasive methods for studying the human brain do not routinely and reliably measure spike-rate-dependent signals, independent of responses such as hemodynamic coupling (fMRI) and subthreshold neuronal synchrony (oscillations and event ...
Eline R Kupers +5 more
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Multiscale modeling of wake-induced propeller cavity bursting [PDF]
International Journal of Fluid EngineeringPropeller cavity bursting, triggered by the sharp hull wake, can significantly increase broadband noise. However, its complex multiscale nature presents substantial challenges for numerical simulations, limiting the prediction accuracy for propeller ...
Xincheng Wang +3 more
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Broadband Photonic Microwave Noise Sources [PDF]
IEEE Photonics Technology Letters, 2020 This work was supported in part by the European Union's Horizon 2020 Research and Innovation Programme (ULTRAWAVE-Project), under Grant 762119.
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Fluctuations and Pinning for Individually Manipulated Skyrmions
Frontiers in Physics, 2021 We numerically examine the dynamics of individually dragged skyrmions interacting simultaneously with an array of other skyrmions and quenched disorder. For drives just above depinning, we observe a broadband noise signal with a 1/f characteristic, while
C. J. O. Reichhardt, C. Reichhardt
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Self-noise produced by an airfoil with nonflat plate trailing-edge serrations [PDF]
, 2013 This paper represents the results of an experimental study aimed at reducing the airfoil self-noise by the trailing edge serration of four different sawtooth geometries (defined in the serration angle and length).
Vathylakis, A +3 more
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