Results 31 to 40 of about 1,058,558 (285)

Soundscape and ambient noise levels of the Arctic waters around Greenland

Scientific Reports, 2021
A longer Arctic open water season is expected to increase underwater noise levels due to anthropogenic activities such as shipping, seismic surveys, sonar, and construction. Many Arctic marine mammal species depend on sound for communication, navigation,
Michael Ladegaard, Jamie Macauley, Malene Simon, Kristin L. Laidre, Aleksandrina Mitseva, Simone Videsen, Michael Bjerre Pedersen, Jakob Tougaard, Peter Teglberg Madsen   +8 more
doaj   +1 more source

Waveguide invariant estimation based on correlation coefficient of tonal acoustic intensity interference fluctuation

Xibei Gongye Daxue Xuebao, 2023
The waveguide invariant is usually not extracted from the striation pattern of broadband continuous spectrum in the low frequency analysis and recording spectrum at low signal-to-noise ratio.
YAO Yuan, SUN Chao, LIU Xionghou, LI Mingyang   +3 more
doaj   +1 more source

Deep Learning Pose Estimation for Phenotyping of Co‐Occurring Hyperkinetic Movement Disorders

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore whether routine outpatient video combined with deep learning‐based pose estimation and clinically interpretable kinematic features can support multi‐label phenotyping of co‐occurring hyperkinetic movement disorders (HMDs).
Laura Cif, Diane Demailly, Gabriella A. Horvàth, Juan Dario Ortigoza Escobar, Nathalie Dorison, Mayté Castro Jiménez, Cécile A. Hubsch, Thomas Wirth, Gun‐Marie Hariz, Sophie Huby, Morgan Dornadic, Zohra Souei, Muhammad Mushhood Ur Rehman, Simone Hemm, Mehdi Boulaymen, Eduardo M. Moraud, Jocelyne Bloch, Xavier Vasques   +17 more
wiley   +1 more source

Aeroacoustic Prediction and Optimization of Unevenly Spaced Blades in Axial Fans

International Journal of Turbomachinery, Propulsion and Power
A common solution for reducing the tonal noise annoyance caused by fans is to change the circumferential blade spacing from even to uneven. However, this technique requires predictive tools to simulate and assess their acoustic performance at a lower ...
Samir Assaf, Thibaut Gras, Jacques Ferhat   +2 more
doaj   +1 more source

Optimization of open counter – rotation fan blades on the basis of solving a 3D Navier-Stokes inverse problem with the aim of reducing tonal noise

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2018
The paper presents some results of gas-dynamic and aero-acoustic optimization of the blade profile of an unducted counter-rotation fan (CRF) by using a 3D inverse problem.
V. I. Mileshin, A. A. Rossikhin, S. V. Pankov, S. K. Shchipin   +3 more
doaj   +1 more source

Corn plants as temporary acoustic barrier to limit the effects of noise pollution

, 2021
Corn is a cereal imported into Europe from the Americas. It is used for human and animal feed, but there are also industrial uses such as the production of ethanol, of fuel for heating homes, or the production of starch. Corn grows in the summer in areas
Ciaburro G., Iannace G., Puyana-Romero V.   +2 more
core   +1 more source

Boundary‐Dependent Sleep–Wake Dysregulation in Idiopathic Hypersomnia

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Idiopathic hypersomnia (IH) presents with excessive daytime sleepiness (EDS) despite apparently preserved nocturnal sleep, challenging traditional models of hypersomnolence based on sleep loss or fragmentation. We aimed to test the hypothesis that EDS in IH reflects excessive stabilization of the sleep state, consistent with ...
Samantha Mombelli, Karine Lacourse, Hélène Blais, Anne‐Sophie Deshaies‐Rugama, Cynthia Thompson, Alex Desautels, Jacques Montplaisir, Milan Nigam, Christophe Moderie, Boshra Khajehpiri, Catherine Duclos, Jean Marc Lina, Julie Carrier, Nadia Gosselin   +13 more
wiley   +1 more source

Active control of high-level tonal noise in flows up to Mach 0.5 using Harmonic Acoustic Pneumatic Sources☆

Acta Acustica
The Harmonic Acoustic Pneumatic Source (HAPS) has been designed to act as a secondary source for active control of fan noise in aircraft engines, taking advantage of the pneumatic energy from the turbofan. One challenge for its use in the nacelle is that
Schiavini Alexandre, Micheau Philippe, Gabard Gwénaël, Humbert Thomas, Grandjean Pierre   +4 more
doaj   +1 more source

Temporal Divergence of True and False Alarms in Pediatric Nocturnal Seizure Monitoring

Annals of Clinical and Translational Neurology, EarlyView.
The early‐morning surge in false seizure alarms supports exploring time‐ or state‐dependent detection thresholds to reduce false detections. ABSTRACT Seizure detection devices can improve the safety of children with epilepsy, yet high false alarms limit their clinical applicability.
Mohammad Shahbakhti, Anemoon T. Bosch, Job van der Palen, Franciscus S. Leijten, Johannes P. van Dijk, Richard H. C. Lazeron, Roland D. Thijs   +6 more
wiley   +1 more source

Spectrum-driven acoustic metasurface for broadband noise control

Results in Physics
To address the issue of broadband noise with tonal characteristics in indoor environments, a spectrum-driven acoustic metasurface (SAM) is proposed in this study.
Qinhao Lin, Junhui Shi, Jin Zhang, Junyi Qiu, Guoqing Di   +4 more
doaj   +1 more source