Articles tagged with Acoustic Waves
A new class of intelligent metamaterials, called metashells, has been developed to respond to nearby objects. These materials can change their physical characteristics, such as permittivity, in accordance with the electromagnetic properties of the material they contain, enabling adaptive behavior.
A team of researchers from Duke University and Aalto University has developed a device called a meta-mirror that can perfectly reflect sound waves in any direction. The device uses metamaterials to control the speed and amplitude of sound waves, allowing it to steer them towards desired directions.
Researchers from the University of Chicago and the University of Bath used acoustic levitation to study the shape of prototypical clusters that form when particles are added one by one. They found that with six particles or more, different shapes can assemble, including parallelogram, chevron, and triangle configurations.
The researchers created an artificial macroscopic crystal inspired by Japanese baskets, emulating the valley-Hall effect in quantum physics. This led to unexpected properties for acoustics, including incredible resistance against defects and curves.
A new analytical model predicts Helmholtz cavity's sound spectrum with high accuracy, enabling efficient design of noise-cancelling systems. The model is optimized for low speed airflows and low frequencies, allowing for modular investigation of complex geometries.
Researchers identified protocadherin 15 as a key protein responsible for converting bending forces from sound waves into electrical signals. This discovery sheds new light on the causes of hearing loss and how sound is transmitted to the brain.
Scientists have developed new metasurfaces that can manipulate reflected light and sound waves with high efficiency. These artificial structures use periodic arrangements of meta-atoms to engineer the direction of reflected waves, breaking classical laws of reflection.
Researchers found that when a plasma jet strikes the magnetopause, it creates drum-like vibrations on its surface, producing standing waves that echo back and forth. These waves can penetrate deep into the magnetosphere, triggering other types of waves and affecting radiation belts, auroras, and ionospheres.
Physicists at ETH Zurich have created acoustic metamaterials that interact differently with Weyl fermions of opposite chirality, a crucial aspect of particle physics. This discovery enables the manipulation of chiral channels, giving independent access to these particles in bulk systems.
Researchers create technique to monitor single cells over generations and investigate stiffness changes during cell division cycle, with potential applications for precision medicine and analyzing patient tumor responses to drugs.
A team at Northumbria University discovered a distinctive marker on magnetic waves in the Sun's corona, indicating that sound waves from inside the Sun excite these waves. This finding suggests a new fundamental constant of the Sun and has significant implications for our understanding of stellar atmospheres.
A team of researchers used floating robotic seismometers to image the interior of the planet and discovered a mantle plume under Galapagos, suggesting an alternative explanation for the Earth's constant temperature over 4.5 billion years. The findings hint at the importance of mantle plumes in regulating the Earth's heat budget.
Researchers at the University of Connecticut created a sensor using iron oxide nanoparticles in silicone that can detect pressure, temperature, and vibration, as well as magnetic fields and sound waves. The sensor could potentially help burn victims feel again and serve as an early warning for workers exposed to high magnetic fields.
A team of researchers has successfully demonstrated the 'strong-coupling regime' between light and high-frequency acoustic vibrations in a tiny glass structure. By overcoming friction-like processes, they were able to observe signatures of the light-sound dance and pave the way for future experiments at near-absolute zero temperatures.
Researchers at KU Leuven devised an elegant way to use sound waves to keep chemicals flowing in miniature reactors. The technology improved efficiency by forcing particles into the center of channels, mixing them, and stopping clogging.
Scientists have successfully created a holographic acoustic tweezers system that can trap and manipulate particles in three dimensions. This technology has potential applications in small-scale assembly and the creation of 3D displays with levitating voxels.
University of Michigan researchers have developed a technique to reveal hidden information in sound waves by shifting frequencies, allowing for improved detection and tracking capabilities in sonar systems. This breakthrough could enhance performance in naval vessels and medical imaging devices, such as biomedical ultrasound.
New insight into opto-mechanics of optical fibers can be applied to sensor systems with longer reach, higher spatial resolution, and better precision.
Scientists study bat and dolphin sonar systems to improve man-made active sensing technologies. Bat species use frequency-modulating calls to overcome acoustic interference, whereas dolphins rely on short clicks with minimal overlap.
Researchers at MIT have developed an innovative acoustic imaging system that enables the instant visualization of massive cod shoals, shedding light on the health of this depleted species. The team's findings suggest that average cod shoal sizes serve as a critical indicator for tracking population recovery.
Researchers at Stanford University have developed a system that uses tiny detectors to map the angle of incoming light waves, inspired by the unique structure of geckos' ears. This technology could support advances in lens-less cameras, augmented reality, and robotic vision.
Researchers identified tail electrons as the source of whistler waves, which help satellites determine their location in space. The discovery marks a new methodology for measuring wave propagation in reconnection, indicating that whistler waves are generated near active X-lines.
Harvard researchers use acoustic forces to create a new technology that enables the printing of materials in a drop-on-demand manner. The technique expands possibilities for biopharmaceuticals, cosmetics, and optical materials, and is safe to use with sensitive biological cargo.
A new technology to detect corrosion and erosion in pipelines can prevent catastrophic explosions at power plants. Dr. Piero Rizzo's project aims to develop a device that monitors pipeline conditions continuously and remotely.
Researchers at MIT Media Lab have developed a system called TARF that uses underwater sonar signals to transmit data to airborne receivers, breaking through the water-air barrier. The system consists of an underwater acoustic transmitter and a highly sensitive receiver that decodes the vibrations caused by the sonar signal.
Researchers created an antilaser for nonlinear Bose-Einstein condensate of ultracold atoms, demonstrating perfect absorption without reflection. The breakthrough can be used to manipulate superfluid flows and study nonlinear optical systems.
Researchers at FAU developed a procedure for detecting and diagnosing heart sounds using radar, with high correlation to traditional methods. The technology has the potential to replace stethoscopes and enable touch-free monitoring of patients' vital functions.
Researchers on the ISS investigated complex plasma behavior, discovering that microparticles exhibit nonuniform wave patterns in response to varying electrical fields. This discovery has implications for understanding astrophysical phenomena and dusty plasmas.
A new motion-sensing technology uses radio waves to detect a person's presence and location anywhere inside a room, even beyond the sensor's line of sight. The system works by analyzing patterns created by radio waves bouncing around the room, allowing it to distinguish between different scenarios and locate objects or people in space.
Researchers at Stanford University have developed a system that automatically renders accurate sounds for complex animated content, such as splashing water or colliding objects. The system takes into account the vibrations of each object and how they excite sound waves, resulting in highly detailed and realistic sounds.
Researchers at EPFL have developed a new method to identify the material surrounding an optical fiber by generating a sound wave within the fiber. This technique allows for non-invasive detection of changes in temperature and pressure, with potential applications in structures such as bridges and gas pipelines.
Researchers create a digital microfluidics platform using soundwaves and oil to avoid contamination for reusable lab-on-a-chip devices. The technology enables programmable, rewritable biomedical chips with exponentially increased combinations of reagent inputs.
Scientists can now study the Sun's complex motions using sound waves captured by NASA and ESA. This sonification technique provides a unique probe into the star's inner workings, revealing huge rivers of solar material flowing around its core.
Researchers found that cratonic roots may contain 1 to 2 percent diamond, with a total estimated value of quadrillion tons. The discovery challenges previous assumptions about the rarity of diamond and sheds light on the geological scale of its presence.
The study demonstrates an interaction between a qubit and surface acoustic waves in the quantum regime, enabling an alternative approach to quantum computer design. This allows for smaller, more stable, and compact quantum computers without the limitations of microwave radiation.
Scientists have created a new way to selectively turn neural circuits on and off without surgery. By combining ultrasound waves, gene therapy, and synthetic drugs, researchers can noninvasively control specific brain regions and cell types. This technique has implications for treating neurological and psychiatric conditions.
Researchers at Duke University have developed a sound wave-based platform that can separate circulating tumor cells from blood samples with high efficiency, making it suitable for clinical use. The technology uses acoustic force to push larger cancer cells into a separate channel, preserving the functions and native states of the cells.
A team of researchers from TU Wien has successfully guided sound waves through an air-filled tube containing irregular obstacles using their wave manipulation concept. By precisely controlling loudspeakers along the tube, they were able to counteract complex dispersal and enable the sound wave to pass with minimal restriction.
Scientists at EPFL have developed a system that allows sound waves to travel across opaque materials without distortion. The tiny speakers can be controlled to amplify or attenuate the sound waves, offsetting the diffusion caused by obstacles and reproducing the original sound exactly on the other side. This technology has potential ap...
Researchers developed a device that reflects sound in its original direction, more than doubling the effective range of previous technologies. The 'retroreflector' uses engineered materials to focus incoming sound waves onto a second layer, sending them back to their source.
A study found that a volcano's geometry impacts its sound waves, allowing scientists to better monitor activity and detect changes. Researchers believe listening to Kilauea's infrasound could help forecast potential eruptive hazards.
Researchers created a 3D underwater acoustic carpet cloak using transformation acoustics, hiding objects from detection instruments like sonar. The cloaked object mimicked the reflecting surface and was undetectable in every direction.
Scientists have discovered that up to 25% of new ocean floor is formed by mantle material without magmatic processes, challenging current understanding. This phenomenon occurs at paces of less than two centimeters per year, particularly in regions like the Cayman Trough.
Acoustic cloaking technology has been developed by researchers at Penn State University, which uses metamaterials to bend sound waves around an object, making it appear invisible to underwater instruments. The team successfully tested their design using a 3-foot-tall pyramid structure in an underwater research tank.
Exposure to ultrasonic sound waves may cause adverse health effects such as nausea, dizziness, and ringing ears. A growing body of evidence suggests that public safety guidelines are based on inadequate data from studies performed decades ago.
Researchers have discovered that tornado-producing storms emit infrasound waves that can be detected hundreds of miles away. By analyzing these waves, meteorologists may gain valuable insights into the formation processes and life cycle of tornadoes, enabling early warning systems and potentially saving lives.
An international team of scientists has discovered planetary waves of vorticity on and inside the Sun similar to those that significantly influence weather on Earth. These solar Rossby waves are gigantic in size and contribute half of the Sun's large-scale kinetic energy, with wavelengths comparable to the solar radius.
Researchers have uncovered behavior in ultracold atoms that resembles the universe in microcosm, with potential implications for cosmology and the early universe's rapid expansion. The study reveals analogies to Hubble friction and provides new insights into energy conversion during inflation.
The new 3D printed metamaterials, developed by researchers at the University of Southern California, can block sound waves and mechanical vibrations remotely using a magnetic field. They have the potential to be used for noise cancellation, vibration control, and sonic cloaking.
Researchers at Duke University have designed a thin material that can control sound waves with almost perfect efficiency, revolutionizing the manipulation of acoustic waves. The device uses a class of materials called metamaterials to redirect and reflect sound waves, offering significant improvements over previous devices.
Researchers developed a nonlinear elastic metasurface that can convert a soundwave's fundamental frequency to its second harmonic, advancing noise control technologies. This concept could isolate low frequencies, making it easier to absorb them, and potentially lead to new acoustic devices like diodes and transistors.
Researchers developed a novel method to detect ongoing seizures in comatose patients using brain waves converted to sound. The sonification of EEG provides a potential tool for quickly assessing patients with suspected subclinical seizures like nonconvulsive status epilepticus.
New research using NASA's THEMIS and Japan's ERG satellite data reveals chirping waves cause pulsating auroras by disturbing electrons in Earth's upper atmosphere. The discovery provides a definitive explanation for the mysterious phenomenon, with implications for understanding plasma waves across the universe.
Researchers at TU Wien observed chemical waves on polycrystalline catalyst surfaces, creating fascinating spiral wave structures. The team learned that the orientation of crystal grains determines the frequency and movement of these waves, providing insights into superior catalytic characteristics.
Researchers found that Egyptian fruit bats use a technique similar to frequency-scanning sonar, pointing different frequencies of sound at slightly different angles to create fine-grained acoustic images. This discovery could lead to the development of cheap sensors with sensing capability.
A study by Kyoto University has found that certain 'mechanosensitive' genes are suppressed when exposed to audible sound. The effects vary depending on the cell type, with some cells showing significant suppression while others show little response.
Scientists at Cardiff University have developed a new method to calculate tsunami size and destructive force by measuring acoustic gravity waves. The technology uses fast-moving underwater sound waves generated after tsunami trigger events, such as earthquakes, making them an ideal source of information for early warning systems.
The researchers have developed a new device that uses sound waves to produce ultraminiature optical diodes, enabling nonreciprocal devices for photonic integrated circuits. These devices protect laser sources from back reflections and are necessary for routing light signals around optical networks.
Researchers at University of Bristol have successfully trapped objects larger than the wavelength of sound in an acoustic tractor beam, paving the way for levitation of humans. The discovery uses rapidly fluctuating acoustic vortices, which are stabilised by controlling the rate of rotation.
Researchers at Caltech and ETH Zürich created a systematic design method for metamaterials using quantum mechanics. They can engineer materials to manipulate incoming waves, such as bending light or reflecting sound waves. This breakthrough could lead to widespread use of metamaterials in various applications.