Articles tagged with Acoustic Waves
A small, wearable ultrasound sticker can monitor organ stiffness and detect subtle changes that signal disease progression. The device has been shown to identify early signs of acute liver failure in rats and may one day help doctors diagnose internal organ failure more effectively.
Researchers visualize second sound, a wave-like movement of heat, independent of physical particle motion in a superfluid. The findings expand understanding of heat flow in superconductors and neutron stars.
Scientists from the Stiller Research Group have successfully cooled the temperature of a sound wave in an optical fiber to 74K (-194C), reducing phonon number by 75%. This achievement brings researchers closer to bridging the gap between classical and quantum mechanics.
The review discusses the optical aspects of QPAT, including mathematical models for light propagation and interaction with biological tissues. The authors outline two approaches to estimating chromophore concentrations from absorbed optical energy density data, highlighting the challenges associated with practical implementation, such ...
Scientists at the University of Illinois have created polymer networks with dynamic bonds that can selectively absorb specific frequencies of sound and vibrations. This innovative material has the potential to improve hearing protection for individuals exposed to loud noises, such as military personnel or helicopter pilots.
A research team developed an innovative optical technique, 'spectrum shuttle,' to produce and shape GHz burst pulses. The method facilitates ultrafast imaging within subnanosecond timescales, enabling analysis of rapid phenomena.
Researchers from EPFL and University of Bologna used asteroseismology to calculate star distances, providing accurate measurements and validating Gaia's parallax data. The study analyzed over 12,000 oscillating red giant stars, measuring their vibrations and oscillations to determine stellar properties.
Researchers used a fiber optic cable to study the Arctic seafloor's seismic structure and temperature. They identified areas with large amounts of ice and detected changes in temperature over seasons, which will help understand global climate change.
Researchers developed a system to capture sound waves in enclosed spaces like theaters and concert halls, converting them into electrical energy. This reduces the risk of hearing loss and promotes an environmentally friendly power management feature.
Researchers developed a deep convolutional neural network to pinpoint cardiac catheter tip locations in photoacoustic images, achieving high precision and recall. The approach has the potential to replace fluoroscopy during cardiac interventions, leading to safer procedures.
Researchers successfully controlled spin waves by using a superconducting electrode, which acts as a mirror to reflect the magnetic field back to the spin wave. This breakthrough offers an energy-efficient alternative to electronics and opens doors for designing new circuits based on spin waves and superconductors.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have developed a system that uses atomic vacancies in silicon carbide to measure the stability and quality of acoustic resonators, which could improve communications and offer new control for quantum computing. The technique also allows for acoustically-c...
Researchers found that deep neural networks often respond the same way to images with no resemblance to the target, generating unnatural signals. The models develop unique invariances that are different from human perceptual systems, causing them to perceive pairs of stimuli as similar despite their differences.
A research team at UNIST has developed a groundbreaking stretchable high-resolution multicolor synesthesia display that generates synchronized sound and light. This technology shatters preconceived boundaries in multifunctional displays, offering unparalleled optical performance and precise sound pressure levels.
Researchers created an inexpensive and effective sound insulation panel using pingpong balls as Helmholtz resonators, capturing ambient sound waves at their natural frequency. The design allows for adjustable acoustic properties and potential applications in various functionalities.
Researchers at MIT have discovered that the sounds produced by rocks under different pressures can reveal their depth and strength, helping scientists identify unstable regions below the surface. This new method could aid in drilling for geothermal energy and understanding the Earth's crust.
Researchers used a unique X-ray technique to capture soundwaves' propagation in a diamond crystal, revealing ultrafast structural phenomena that were previously beyond scientific reach. The breakthrough enables real-time imaging of solid materials with unprecedented resolution and speed.
Scientists have developed a tiny, simple setup to make precise pressure measurements using light and sound waves. This method enables exploration of extreme thermodynamics in nanolitre volumes, revealing new properties in unique thermodynamic states of materials.
A new imaging technique, multifocal acoustic radiation force-based reverberant optical coherence elastography (RevOCE), has been developed to measure the elasticity of multiple eye components simultaneously. This approach offers high resolution measurements of the stiffness of eye structures and could revolutionize how we study ocular ...
Scientists at IISc have developed hybrid nanoparticles that can kill cancer cells using heat and enable their detection using sound waves. The nanoparticles combine the photothermal and oxidative stress properties of gold and copper sulphide, making them a promising approach for early detection and treatment.
Researchers will investigate topological acoustics to improve computing speeds, reduce power usage in smartphones, and enhance sensing capabilities. The new center aims to harness the full power of acoustic waves to reveal extraordinary properties of sound.
Researchers developed a noninvasive technique to visualize and differentiate nerve tissue using multispectral photoacoustic imaging. The study revealed the optimal wavelengths for identifying nerve tissue, which could improve nerve detection and segmentation techniques.
WVU linguists analyze speech recordings to determine how intensity and duration shape pronunciation in American English and Spanish. The two-year study aims to redefine sound patterns across languages.
Researchers from FAU Harbor Branch deployed an autonomous wave glider to survey marine managed areas off Puerto Rico, recording grouper mating calls and determining spatiotemporal distribution of the two species. The study highlights the importance of spatial and temporal expansion of existing regulations to protect threatened species.
Researchers demonstrate the potential of optical imaging for safely measuring vocal fold elasticity and pliability. The study found good agreement between Brillouin microspectroscopy results and conventional elasticity measurements.
Researchers have developed a new measurement technique that uses the Kramers-Kronig relation to untangle complex helical light patterns from camera intensity measurements. This allows for single-shot retrieval of orbital angular momentum spectrum information, accelerating and simplifying the process compared to conventional on-axis int...
A Northwestern University-led team developed the first 3D simulations of energy rippling from a massive star's core to its outer surface. The researchers determined how much stars should innately twinkle and converted these waves into sound waves, allowing listeners to hear both what the insides of stars and their twinkling sound like.
Astronomers have created the first computer simulations showing how convection in the cores of massive stars generates waves that result in flickering starlight. The effect is different from the visible twinkling of stars in the night sky and could be observed with improved telescopes.
A research team at POSTECH successfully demonstrated the existence of bound states in the continuum using an acoustoelastic coupling structure. The phenomenon enables the confinement of elastic waves, similar to light particles, facilitating applications such as vibration focusing and energy harvesting.
Acoustics researchers have decomposed sound into its three basic components, whistles, clicks, and hisses, using ideas from auditory perception, fuzzy logic, and perfect reconstruction. The new method emerges as the winning way to decompose most sounds in a listening test.
Researchers have developed a new technology that uses acoustic tweezers to precisely control bacterial clusters in live mice, demonstrating a promising approach for targeted drug delivery and cellular therapy in cancer treatment. The technology, called PAHAT, enables precise non-contact manipulation of cells in living organisms.
The study used a battery-powered acoustic array to record Goliath grouper sounds at an artificial reef, assessing their presence by measuring acoustic activity and habitat distribution. The results showed that the model can be used to automatically process large amounts of acoustic data and provide detailed movements of marine organisms.
VIRTUOSO, developed by Dr. Hyunkook Lee from the University of Huddersfield's Applied Psychoacoustics Lab, enables immersive 3D audio without loudspeakers through binaural technology powered by ASPEN. This technology simulates the ambience and reflections found in a room with headphones, allowing for accurate translation to real speakers.
A team of researchers has created an acoustic microfluidic method to study swimming cells and microorganisms, including the single-cell alga Chlamydomonas reinhardtii. The device uses ultrasonic waves to trap cells in place without affecting their swimming behavior, enabling controlled experiments on cilia motion and cell motility.
EPFL scientists develop a novel concept, called the active 'plasmacoustic metalayer', which can be controlled to cancel out noise. The device is more compact than conventional solutions, absorbing 100% of incoming sound intensity and offering tunable acoustic reflection over a broad bandwidth.
A team of researchers developed an acoustic metasurface-based holography technique that uses a deep learning algorithm to generate and iteratively improve a hologram of the Mona Lisa. The technique successfully reconstructed the painting, with even greater detail in her left eye.
Scientists from Hokkaido University propose a cheap and effective alternative for monitoring glacial runoff by analyzing audible sounds generated at the proglacial run-off site. The method has shown promising results in detecting changes in glacier discharge with high accuracy.
A new high-speed two-photon microscope was developed with an unprecedented line scanning frequency of 400 kHz, achieving up to 10,000 frames per second. This allowed for precise observations of complex biological processes in living tissues, including calcium signal propagation and blood flow measurements.
Researchers developed an AI-based early warning system that combines acoustic technology with artificial intelligence to classify earthquakes and determine potential tsunami risk. The system uses underwater microphones to measure acoustic radiation, which travels faster than tsunami waves and carries information about the tectonic event.
Researchers at the University of Bristol used NASA's InSight lander data to detect seismic waves traveling into Mars' core, revealing a denser and smaller core comprising iron and numerous other elements. The study found that the core's composition is distinct from Earth's, with a high fraction of light elements alloyed with iron.
A team of researchers has created a two-stage device that uses acoustic forces to aggregate and remove microplastics from water samples. The device, made with steel tubes and pulsing sound waves, can remove over 70% of small plastics and 82% of large ones, making it a promising solution for removing microplastics from waterways.
A researcher has converted elements' visible light into audio, creating complex sounds for each one. The project aims to create an interactive musical periodic table with potential value as an alternative teaching method in chemistry classrooms.
Physicists at Delft University of Technology have developed a new technology on a microchip combining optical trapping and frequency combs to measure distances with high precision in opaque materials. The technology uses sound vibrations instead of light, offering a simple and low-power solution for applications such as monitoring the ...
Researchers measured noise levels at locations around the launch pad, finding maximum sound levels exceeded predicted values by nearly 20 decibels. The study's findings will help validate and improve existing noise prediction models to protect equipment and surrounding environments.
Researchers at Max Planck Institute and Heidelberg University have developed a technology to assemble matter in 3D using sound waves. They successfully printed microparticles, gel beads, and biological cells into three-dimensional shapes, paving the way for novel 3D cell culture techniques.
Researchers at Tohoku University developed a new acoustic waveguide based on topology to minimize energy consumption in electronic devices. The team created a topological waveguide that minimizes energy loss and allows for unique wave manipulation.
Researchers at RMIT University have developed a method to remove rust from nanomaterial MXene, extending its lifetime and making it suitable for recyclable batteries. The innovation uses high-frequency sound waves to restore the material's electrical conductivity, paving the way for up to three times longer battery life.
A team of researchers has developed a system that uses fibre-optic cables to detect and measure acoustic signals from the ocean, including whale vocalizations, ship traffic, earthquakes, and distant storms. This technology has the potential to create a global real-time monitoring network for Ocean-Earth sciences.
Researchers at KAUST have developed acoustic tweezers that use spinning sound waves to manipulate ultrasmall objects with precision. This technology has the potential to enable precise control of submillimeter objects in opaque media, such as soft biological tissues.
Researchers from the University of Washington analyzed the Hunga Tonga-Hunga Ha'apai eruption in the South Pacific, discovering that ionosphere signals can help explain why tsunami waves grew larger and traveled faster than predicted. The study validated the use of GPS signals traveling through the atmosphere to track events on the gro...
Engineers at RMIT University have developed a method to boost green hydrogen production through electrolysis by up to 14 times using high-frequency vibrations. This innovation tackles the high cost of electrode materials and eliminates the need for corrosive electrolytes, making it cheaper and more efficient.
NASA will conduct a series of flights over various communities to test its Quesst Mission Supersonic STEM Toolkit and measure sound levels. The mission hopes to inform an overland supersonic sound standard, potentially cutting flight times in half.
Engineers at Duke University developed a device that separates and sorts tiny biological nanoparticles from blood using 'virtual pillars' created by sound waves. The technology, dubbed ANSWER, shows promise for diagnostics and treatments, with accuracy rates of up to 96%.
A team of researchers has successfully controlled individual photons on a chip with unprecedented precision, enabling the development of hybrid quantum technologies. By harnessing nanoscale soundwaves, they can switch photons between two outputs at gigahertz frequencies, paving the way for secure quantum communication networks.
Researchers have successfully segregated oppositely helical supramolecular polymers in a solution using audible sound, inducing surface vibrations and advection currents. This approach allows for the spatiotemporal control of chiral supramolecular systems, enabling the segregation of multiple aggregates.
Scientists review natural structures with exceptional properties, such as wood, bones, spider webs, and sea sponges. These hierarchical structures can be used to design innovative materials for vibration damping and acoustic wave control.
Scientists at the Max Planck Institute have developed a unidirectional device that significantly increases the quality of optical vortex signals. By transmitting selective optical vortex modes exclusively unidirectionally, they largely reduce detrimental backscattering to a minimum.
Researchers at the University of Technology Sydney have extended the theory of acoustic levitation to account for asymmetrical particles, which is more applicable to real-world experience. This new understanding enables precise control and sorting of tiny objects using ultrasonic waves.
MIT researchers create a low-power, sound-harvesting camera that captures color photos and transmits data wirelessly. The autonomous device can run for weeks without power, enabling scientists to explore remote oceans and monitor climate change impacts.
Researchers located four new craters created by impacts on Mars' surface using data from a seismometer and visuals acquired from the Mars Reconnaissance Orbiter. This is the first time that researchers have captured the dynamics of an impact on Mars.