Results 41 to 50 of about 476,526 (274)

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Design exploration and performance strategies towards power-efficient FPGA-based achitectures for sound source localization [PDF]

, 2019
Many applications rely on MEMS microphone arrays for locating sound sources prior to their execution. Those applications not only are executed under real-time constraints but also are often embedded on low-power devices.
Braeken, An, da Silva Gomes, Bruno, Segers, Laurent, Steenhaut, Kris, Touhafi, Abdellah   +4 more
core   +1 more source

On the Influence of Antioxidants and Recycled MgO–C Source Material on the Mechanical Properties of Carbon‐Bonded Magnesia Refractories

Advanced Engineering Materials, EarlyView.
The presented study focuses on the fracture behaviour of carbon‐bonded magnesia MgO–C refractories, where environmentally friendly fructose, collagen and lignin serve as temporary binding agents. The partial substitution of the source material with recycled MgO–C reduces the fracture resistance, which can be counteracted by the additional introduction ...
Marc Neumann, Tom Weber, Jana Hubálková, Florian Kerber, Dinesh Kumar Gunasekar, Hans Jelitto, Christos G. Aneziris   +6 more
wiley   +1 more source

Research on Optimization of Acoustic Packaging Performance of Electric Vehicle Motor Compartment Based on Transfer Matrix Theory

Medžiagotyra
This study addresses the prevalent issue of inadequate low-frequency sound absorption within electric vehicle motor compartments by introducing a novel multi-layer composite acoustic structure characterized by a gradient flow resistance design, grounded ...
Jintao SU, Weizheng LIU, Nenghui HUANG
doaj   +1 more source

Design and performance of duct acoustic treatment [PDF]

, 1991
The procedure for designing acoustic treatment panels used to line the walls of aircraft engine ducts and for estimating the resulting suppression of turbofan engine duct noise is discussed.
Kraft, R. E., Motsinger, R. E.
core   +1 more source

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source

Comparative Study on the Performance of a Conventional Two-Blade and a Three-Blade Toroidal Propeller for UAVs

Eng
This paper presents an integrated study on the design, simulation, manufacturing, and experimental testing of a three-blade tritoroidal propeller compared to a conventional two-blade configuration for small UAVs. The aerodynamic analysis was performed in
Daniel Mariuta, Claudiu Ignat, Grigore Cican   +2 more
doaj   +1 more source

A Compact and Discriminative Feature Based on Auditory Summary Statistics for Acoustic Scene Classification

, 2019
One of the biggest challenges of acoustic scene classification (ASC) is to find proper features to better represent and characterize environmental sounds.
Deng, Shiwen, Han, Jiqing, Song, Hongwei
core   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

The performance of an acoustic levitator

Journal of Physics: Conference Series, 2020
Abstract An acoustic levitator uses an array of ultrasonic transducers to generate a standing acoustic pressure field which exerts a radiation force on small particles, allowing the particles to be trapped, relocated, separated or combined.
C H Hsu, H Y Lin, A Agarwal, I Davis, K P Nolan, K B Lua   +5 more
openaire   +1 more source