A magnetically actuated acoustic metamaterial
Space coiling acoustic metamaterials are static and require manual reconfiguration for sound-field modulation. In a new report published in Communications Materials, Christabel Choi, and a team of scientists in computer science and engineering in the.....»»
Fiber Optics Bring You Internet. Now They’re Also Listening to Trains
“Distributed acoustic sensing” looks for disturbances in fiber to detect earthquakes and even insects. Can it also improve rail safety?.....»»
A magnetically actuated acoustic metamaterial
Space coiling acoustic metamaterials are static and require manual reconfiguration for sound-field modulation. In a new report published in Communications Materials, Christabel Choi, and a team of scientists in computer science and engineering in the.....»»
Research team develops optical technique for simultaneously producing and shaping gigahertz burst pulses
The generation and manipulation of high-repetition pulses hold great promise across various applications, including high-speed photography, laser processing, and acoustic wave generation. Gigahertz (GHz) burst pulses, with intervals ranging from ~0.0.....»»
Exploring acoustic design for better, quieter prisons
Prisons are typically noisy environments, filled with clanking metal bars and echoing concrete surfaces. This level of constant noise is harmful to both prisoners and staff, but there are few guidelines for designing better, quieter facilities......»»
Physicist explains X-rays that shouldn"t exist in "cold" plasma
For about 20 years, Caltech Professor of Applied Physics Paul Bellan and his group have been creating magnetically accelerated jets of plasma, an electrically conducting gas composed of ions and electrons, in a vacuum chamber big enough to hold a per.....»»
Acoustic diffraction-resistant adaptive profile technology for elasticity imaging
Acoustic beam shaping with high degrees of freedom is critical for ultrasound imaging, acoustic regulation, and stimulation. The ability to fully regulate the acoustic pressure profile relative to its propagation path remains to be achieved......»»
Hera asteroid mission completes acoustic testing
ESA's Hera asteroid mission has completed acoustic testing, confirming the spacecraft can withstand the sound of its own lift-off into orbit. Testing took place within the Agency's Large European Acoustic Facility at the ESTEC Test Center in the Neth.....»»
Researchers realize water-air acoustic communication based on broadband impedance matching
With increasing demand for exploration and utilization of marine resources, achieving direct and efficient communication between water and air has been an urgent need. Sound waves, as the only propagation way with low attenuation in both water and ai.....»»
Arctic Ocean soundscapes reveal changes in mammal populations in response to climate change
While the sounds of our oceans may be familiar to us through the lens of nature documentaries, from the haunting calls of whales to the barks of some fish, this acoustic environment can provide a wealth of knowledge to scientists regarding the comple.....»»
A strategy for the spin-acoustic control of silicon vacancies in a 4H silicon carbide-based bulk acoustic resonator
Bulk acoustic resonators—stacked material structures inside which acoustic waves resonate—can be used to amplify sounds or filter out undesired noise. These resonators have found wide use in today's RF telecommunication, like Front-End Modules (F.....»»
Measuring the changing soundscape in Glacier National Park
From the eerie echo of a bugling elk to the gentle swoosh of water lapping against a stony shore, a unique combination of sounds helps distinguish each national park. This acoustic environment, as perceived by humans, is known as a soundscape, and it.....»»
Next-generation Apple Pencil might have interchangeable magnetic tips
It’s been five years since Apple introduced Apple Pencil 2 for the iPad, which brought a new design that’s more comfortable to hold and recharges magnetically. Rumors about a new Apple Pencil are pretty vague at this point, but the X user known a.....»»
Using DNA as glue to hold nanostructures together and build ultra-strong colloidal crystal metamaterials
A team of chemical and biological engineers working with a group of nanotechnologists at Northwestern University in Illinois has developed a type of super-strong colloidal crystal metamaterial by gluing together metal nanostructures using strands of.....»»
New metamaterial-based strategy to combine and transmit multiple light modes
The past few years have seen a massive surge in the amount of data transferred and processed per second. Rapidly emerging technologies, such as high-dimensional quantum communications, large-scale neural networks, and high-capacity networks, require.....»»
How does "MAD" accretion form around a black hole?
An international scientific team has revealed for the first time the magnetic field transport processes in the accretion flow of a black hole and the formation of a "MAD"—a magnetically arrested disk—in the vicinity of a black hole......»»
New study reveals temperature-coupled song preferences in an eavesdropping parasitoid fly
Ambient temperature can affect acoustic communication signals produced by ectothermic signalers. For example, the temporal features of acoustic signals can occur at a higher rate at higher temperatures. If species recognition is based on evaluating t.....»»
Passages review: Ira Sachs’ portrait of a romantic scoundrel
Franz Rogowski plays a magnetically selfish lothario in Ira Sachs' compact drama, Passages......»»
Acoustic emission monitoring technique, an essential way to analyze pulsed laser processing
Acoustic emission (AE) monitoring is used to reveal the interaction mechanisms in pulsed laser processing of float glass. Circular ablated pits and irregular shaped cracks are formed on the float glass's upper surface by the pulsed laser dotting. By.....»»
Fiber optic sensing tracks seismicity from injected carbon dioxide at Australian site
Researchers at a field site in Victoria, Australia are among the first to use fiber optic distributed acoustic sensing (DAS) for high-precision tracking of induced seismicity from a small carbon dioxide (CO2) injection, according to a new study publi.....»»
Proposed metamaterial could have a wide range of applications, from sensing to stealth technology
Metamaterials are a type of artificial material which, as the prefix "meta"—meaning in Greek "after" or "beyond"—indicates, demonstrate electromagnetic properties and other characteristics not found in nature......»»