Results 41 to 50 of about 21,854 (248)

Effect of Controlled Muscle Activation in a Unilateral Vocal Fold Polyp Setting on Vocal Fold Vibration

Applied Sciences, 2022
Unilateral vocal fold polyps can lead to incomplete glottal closure and irregular vocal fold vibration. Depending on polyp size and resulting dysphonia severity, voice therapy or surgery may be recommended.
Mingjun Ji, Boquan Liu, Jack Jiang, Matthew R. Hoffman, Jinwei Lan, Jin Fang   +5 more
doaj   +1 more source

Experimental Prediction Method of Free-Field Sound Emissions Using the Boundary Element Method and Laser Scanning Vibrometry

Acoustics
Acoustic emissions play a major role in the usability of many product categories. Therefore, mitigating the emitted sound directly at the source is paramount to improve usability and customer satisfaction.
Andreas Wurzinger, Florian Kraxberger, Paul Maurerlehner, Bernhard Mayr-Mittermüller, Peter Rucz, Harald Sima, Manfred Kaltenbacher, Stefan Schoder   +7 more
doaj   +1 more source

Effects of Aeroelastic Walls on the Aeroacoustics in Transonic Cavity Flow

Aerospace, 2022
The effects of elastic cavity walls on noise generation at transonic speed are investigated for the generic M219 cavity. The flow is simulated with the Spalart–Allmaras (SA) improved delayed detached-eddy simulation (IDDES) turbulence model in ...
Stefan Nilsson, Hua-Dong Yao, Anders Karlsson, Sebastian Arvidson   +3 more
doaj   +1 more source

Numerical evaluation of the aerodynamic and noise characteristics of an axial flow fan in a large aeroacoustic wind tunnel

Kongqi donglixue xuebao
This study numerically investigates the flow field and aerodynamic performance of the axial fan system in the 4 m × 3 m low-turbulent and aeroacoustic wind tunnel of Beihang University (BHAW).
Peiqing LIU, Peiqing LIU, Yue CHEN, Yue CHEN, Jin ZHANG, Jin ZHANG, Qiulin QU, Qiulin QU, Hao GUO, Hao GUO, Lichuan MA, Lichuan MA   +11 more
doaj   +1 more source

Computational aeroacoustics of human phonation

EPJ Web of Conferences, 2013
The current paper presents a CFD model of flow past vibrating vocal folds coupled to an acoustic solver, which calculates the sound sources from the flow field in a hybrid approach.
Šidlof P., Zörner S.
doaj   +1 more source

Applicability of Aeroacoustic Scaling Laws of Leading Edge Serrations for Rotating Applications

Acoustics, 2020
The dominant aeroacoustic mechanisms of serrated leading edges, subjected to highly turbulent inflow conditions, can be compressed to spanwise decorrelation effects as well as effects of destructive interference.
Till M. Biedermann, Pasquale Czeckay, Nils Hintzen, Frank Kameier, C. O. Paschereit   +4 more
doaj   +1 more source

Assessment of Optimization Methods for Aeroacoustic Prediction of Trailing-Edge Interaction Noise in Axisymmetric Jets

Mathematics, 2021
Our concern in this paper is in the fine-tuning of the arbitrary parameters within the upstream turbulence structure for the acoustic spectrum of a rapid-distortion theory (RDT)-based model of trailing-edge noise.
Sarah Stirrat, Mohammed Z. Afsar, Edmondo Minisci   +2 more
doaj   +1 more source

Coupled Fluid–Structure–Acoustic Analysis of Flow‐Induced Noise Control Using an Elastic Baffle in a Micro Channel

Energy Science &Engineering, EarlyView.
This research explores how fluid flow, structural movement, and sound interact in an elastic baffle system. Using a numerical approach based on the finite element method, the study analyzes how noise and vibrations change with different baffle configurations. The findings reveal that shortening the baffle by half reduces noise transmission by 9%, while
Tohid Adibi, Seyed Esmail Razavi, Shams Forruque Ahmed, Khashayar Fardnia, Aydin Qheydarpoor, Hammad Alotaibi   +5 more
wiley   +1 more source

Aerospace Engineering Undergraduate Laboratory Courses: A Systematic Review (1990–2025)

Computer Applications in Engineering Education, Volume 34, Issue 2, March 2026.
ABSTRACT This review examines the evolution of undergraduate aerospace engineering (AE) laboratories from 1990 to 2025, focusing on course formats, pedagogy, technology, and assessment. Once centered on traditional demonstration‐based exercises, AE laboratories have increasingly shifted toward hands‐on, project‐based, and hybrid physical‐virtual models
Mingtai Chen
wiley   +1 more source

Prediction of Aircraft Surface Noise in Supersonic Cruise State

Aerospace, 2023
The aerodynamic noise of an aircraft leads to vibration fatigue damage to structures. Herein, a prediction method for aircraft surface noise under the comprehensive effect of mixed acoustic sources during flight, primarily surface aerodynamic, air intake,
Xiaoguang Zhang, Huixue Dang, Bin Li
doaj   +1 more source