Results 71 to 80 of about 1,599,200 (292)

Simulation Analysis of the Sound Transmission Loss of Composite Laminated Cylindrical Shells with Applied Acoustic Coverings

Shock and Vibration, 2022
The noise reduction problem of composite laminated cylindrical shells at low and medium frequencies from 150 Hz to 1000 Hz is addressed by using the noise control method of laying acoustic coverings and conducting noise reduction experiments in a ...
Bin Li, Haoyang Ding, Zhigang Hu, Junya Zhao, Menghui Qi, Zhiyong Wang   +5 more
doaj   +1 more source

Computation of Trailing Edge Noise with a Discontinuous Galerkin Method [PDF]

, 2008
Trailing edge noise of a semi-infinite, thin, flat plate situated in low Mach number flow is computed in two spatial dimensions. The Acoustic Pertur- bation Equations (APE), which are employed as governing equations, are discretized via a ...
Bauer, Marcus
core  

Millifluidic Synthesis of Core–Shell Resonators For Tunable Sonic BandGaps in Acoustic Metamaterials

Advanced Materials Interfaces, EarlyView.
Millimeter‐scale core–shell acoustic resonators are fabricated by a gravity‐assisted dripping approach and incorporated into epoxy composites at controlled volume fractions. The resulting alumina–core resonator composites show tunable low‐frequency acoustic attenuation, demonstrating a scalable route for integrating locally resonant metamaterial units ...
Colton Steiner, Xiaohui Shen, Bianka Pajo, Chin‐Teh Sun, Jeffrey P. Youngblood, Carlos Martinez   +5 more
wiley   +1 more source

Aerosol Jet Printing of Benzocyclobutene as a Thermally Stable, Low‐Loss Dielectric for Multilayer Microwave Electronics

Advanced Materials Technologies, EarlyView.
Multilayer aerosol jet printed components with a low‐loss, thermally stable dielectric are demonstrated using benzocyclobutene. Ink formulation and in‐line droplet evaporation control support high‐quality, versatile, and stable printing performance. A specialized measurement for low‐loss materials reveals promising microwave properties, which, combined
Md Ramjan Ali, Trent Moritz, Mohammad Tayeb Al Qaseer, Ethan B. Secor   +3 more
wiley   +1 more source

The interaction of building energy use, ventilation performance and urban noise under future climate scenarios [PDF]

, 2012
This thesis studies the interaction of building energy use, ventilation performance and urban noise under future climate scenarios, comparing in particular the noise and climatic influences on non-domestic natural ventilation cooling.
Barclay, Michael
core   +4 more sources

Toward Perception‐Native Electronic Skin: Bio‐Inspired In‐/Near‐Sensor and Neuromorphic Computing for Humanoid Robots

Advanced Materials Technologies, EarlyView.
Dense tactile streams from across the humanoid body converge on collide in a central wiring and data bottleneck. By relocating computation closer to and then into the skin itself, near‐ and in‐sensor architectures, together with neuromorphic computing, chart a path toward perception‐native electronic skin, in which the conversion of stimulus into ...
Mijin Kim, Chang‐Jae Beak, Jiyoung Park, Youngdo Jung, Sunjong Oh, Sin‐Hyung Lee, Bo‐Yeon Lee   +6 more
wiley   +1 more source

Source of Acoustic Noise in a 12/16 External-Rotor Switched Reluctance Motor: Stator Tangential Vibration and Rotor Radial Vibration

IEEE Open Journal of Industry Applications, 2020
Compared with internal-rotor switched reluctance motors (SRMs), external-rotor (ER) SRMs can show different vibration and acoustic noise behavior due to the differences in the designs, e.g.
Jianbin Liang, Brock Howey, Berker Bilgin, Ali Emadi   +3 more
doaj   +1 more source

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

Advanced Optical Materials, EarlyView.
A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio, Giulio Carotta, Lorenzo Lavista, Andrea Camposeo, Giacomo Venturi, Agnese Guernieri, Alessandro Pitanti, Simon A. R. Horsley, Giuseppe C. La Rocca, Alessandro Tredicucci, Simone Zanotto   +10 more
wiley   +1 more source

Acoustic properties and durability of porous low-noise pavement solutions to improve acoustic environment: a critical literature review

International Journal of Transportation Science and Technology
Road traffic noise represents a significant source of noise pollution in residential areas. Studies have confirmed the availability of dissipating the sound energy generated by the interaction between tires and pavement by taking porous pavement. However,
Hui Li, Lei Wang, Yuzhao Han, Xue Zhang, Haopeng Zhang, Luchuan Chen   +5 more
doaj   +1 more source

Examining tunnel current responses to acoustic excitation for STMs in gaseous environments

AIP Advances, 2018
Scanning tunneling microscopes are used to examine surfaces and surface properties with sub-nanometer precision. However, this high precision means these microscopes are extremely sensitive to vibration.
William Myers, Mark Bowling, Jessica E. Bickel   +2 more
doaj   +1 more source