Search results for acoustic lens

Optics & Photonics Apr 3, 2024

Intelligent liquid: Researchers develop metafluid with programmable response

Researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed a programmable metafluid with tunable springiness, optical properties, viscosity and even the ability to transition ...

Optics & Photonics Mar 23, 2024

Research team proposes a novel type of acoustic crystal with smooth, continuous changes in elastic properties

In dim light a cat sees much better than you do, as do dogs and nocturnal animals. That's because the structure of a cat's eye has a tapetum lucidum, a mirror-like layer immediately behind the retina. Light entering the eye ...

Plants & Animals Jan 22, 2024

Don't blame the sharks: Research reveals why more hooked tarpon are being eaten

In wave-making research recently published in Marine and Coastal Fisheries, a team of researchers, led by biologists at the University of Massachusetts Amherst, has quantified the rate at which great hammerhead sharks are ...

Optics & Photonics Jan 16, 2024

'Quantum ping-pong': Two atoms can be made to bounce a single photon back and forth with high precision

Atoms can absorb and reemit light—this is an everyday phenomenon. In most cases, however, an atom emits a light particle in all possible directions—recapturing this photon is, therefore, quite hard.

Plants & Animals Nov 6, 2023

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 ...

Condensed Matter Sep 28, 2023

Revolutionary X-ray microscope unveils sound waves deep within crystals

Researchers at the Department of Energy's SLAC National Accelerator Laboratory. Stanford University, and Denmark Technical University have designed a cutting-edge X-ray microscope capable of directly observing sound waves ...

Earth Sciences Jun 16, 2023

Seismology at light speed: How fiber-optic telecommunications cables deliver a close-up view of Alpine Fault

Aotearoa New Zealand experiences frequent earthquakes, including destructive ones such as those that struck Christchurch in 2010 and 2011, and near Kaikōura in 2018.

Plants & Animals Aug 2, 2022

Vaquita porpoises escape extinction longer than expected

Projections previously indicated that the vaquita could be extinct by now but, while they remain the world's most endangered marine mammal, the new research shows the few survivors are reproducing, and may have developed ...

General Physics May 12, 2022

Acoustic black holes as noise traps in wooden structures

Research is currently being completed at Empa on a world-first in the sound insulation of wooden buildings. Using a physical theory from the 1990s and the tools of digitization, a research team has developed new floor elements ...

Optics & Photonics Feb 2, 2022

A new amplifying technique for weak and noisy optical signals

Weak optical signals are common in many science and technology applications. However, they are difficult to detect or process due to the incoherent noise that is inherently present in any system. Ph.D. student Benjamin Crockett ...

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