Articles tagged with Acoustic Waves
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
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Researchers at Cambridge University have developed a technique to transfer quantum information by controlling individual electrons in Gallium Arsenide. This innovation has the potential to enable faster and more efficient processing in quantum computers, addressing complex problems beyond classical computers' capabilities.
Researchers at Stanford University have developed a new method to detect sunspots forming deep inside the sun, allowing for up to two days' warning before solar storms. The method uses acoustic waves generated by turbulent plasma and gases, and has been successfully tested four times.
Researchers created a prototype of an acoustic cloak by arranging cylinders around an object, demonstrating that sound waves maintain their original wave-front pattern as they pass around the object. The proposed technique could enable better soundscapes in urban environments and quieter helmets for ear protection.
Researchers at Caltech have created a tunable acoustic diode that allows acoustic information to travel only in one direction, controllable by frequency. This technology brings soundproofing closer to reality, with potential applications in biomedical ultrasound devices and energy-harvesting systems.
Researchers captured high-speed images of fluid-filled Tibetan bowls to quantify how droplets are propelled from the water's surface as the bowls are excited. The unique singing properties of Tibetan bowls were used to investigate a liquid's interaction with solid materials, a situation that arises in many engineering applications.
Researchers designed a hydrophone that can capture full range of ocean sounds from soft whispers to explosions, accurately at any depth. They achieved this using lasers and mirrors to detect minute movements on the diaphragm, inspired by orca ears' optimized sonar.
Researchers at the Weizmann Institute developed a quantum version of a locked-in amplifier using a single atomic-ion detector, achieving spatial resolution of just a few nanometers. This technique improves the sensitivity of quantum sensors by around 100 times.
Engineers at Asius Technologies create a device that seals the ear canal, boosting sound pressures and alleviating listener fatigue. The technology uses a sacrificial membrane to absorb pressure waves, protecting the ear drum and preventing over-activation of the acoustic reflex.
Researchers at NRL have demonstrated the polarization of graphene's valley degree of freedom through scattering off a naturally occurring line defect, offering a potential path to valleytronics. This discovery could lead to more robust and efficient electronic devices.
A Rensselaer Polytechnic Institute doctoral student has developed a novel method to extend the distance of terahertz technology's effective detection range using sound waves. The technique allows for safer detection of hidden explosives, chemicals, and other materials from several meters away.
Benjamin Clough, a doctoral student at Rensselaer Polytechnic Institute, has developed a novel method for eavesdropping on terahertz information hidden in invisible plasma acoustic bursts. His technique uses sound waves to boost the distance from which researchers can use powerful terahertz technology to remotely detect hidden explosiv...
University of Illinois researchers create an acoustic cloak that hides underwater objects from detection, using metamaterials to manipulate sound waves. The technology has potential applications in military stealth, soundproofing, and medical imaging.
Researchers have created a more accurate seismic model to detect nuclear explosions and differentiate them from natural events. The model spans the complex tectonic region of Turkey to India, and will improve location and characterization of seismic events while reducing errors.
Researchers have developed a device that uses sound waves to detect bacteria in water, potentially speeding up the process by 15% compared to existing methods. The device broadcasts ultrasound waves into the liquid, exerting pressure on bacteria that pushes them into a collection pocket for identification.
Researchers have developed a three-dimensional metamaterial that captures evanescent sound waves, allowing for super-resolution acoustic imaging. The device, mounted on an ultrasound probe, can resolve image features as small as one-fiftieth of the wavelength of the sound waves.
Shear Alfvén waves are important in plasma stability and heating, while also contributing to aurora formation and solar corona acceleration
New research from UCLA and the British Antarctic Survey reveals that chorus waves are responsible for scattering trapped electrons into the Earth's atmosphere. The findings have significant implications for understanding space weather and its effects on satellites, power grids, and aviation industries.
Researchers have developed a new nanotube technology that can generate sound waves for submarine sonar while also canceling out noise. This breakthrough could enhance underwater detection and stealth capabilities for military submarines.
Researchers have confirmed an axiom in quantum physics by ruling out the existence of higher-order interferences experimentally. This confirms the accuracy of Born's law, a key principle in quantum mechanics that proposes interference occurs in pairs of possibilities.
Researchers have developed carbon nanotube speakers that can generate sound waves and cancel out noise, ideal for submarine sonar. These 'nanotube speakers' can also be tuned to specific frequencies to detect underwater objects, enhancing stealth capabilities.
Researchers at Caltech develop a nonlinear acoustic lens producing highly focused sound bullets for advanced medical imaging, nondestructive evaluation, and potentially even cancer treatment. The device exploits particle contacts to create compact acoustic pulses with high amplitude and low distortion.
A Carnegie Mellon student has created a technology called Skinput, which uses bio-acoustic sensors and machine learning to enable touchless control of smartphones and other mobile devices. The system can classify inputs with high accuracy, even when using different body parts.
Researchers at Woods Hole Oceanographic Institution developed two advanced broadband acoustic systems to improve interpretation of echoes. These systems measure sound scattering across a continuous range of frequencies, generating broadband acoustic spectra that can distinguish between different fish sizes and densities, as well as ide...
Researchers found that image recognition and memories are stronger when neurons fire in sync with local theta waves during the learning process. The study also established a direct relationship between individual neuron spike timing relative to theta oscillations and human behavior.
Large amplitude internal waves can reach heights of 150 meters in the South China Sea, affecting surface wave fields and observable from space. The Earth's rotation modifies these waves as they travel across the deep ocean basin, influencing their steepening process.
Researchers at the Weizmann Institute of Science found that bats aim their sound beams off-center when locating objects, making this strategy more efficient than aiming directly at the center. This approach allows bats to better track movement across the beam.
Researchers have developed a new technology called 'T-rays' that can penetrate through opaque dry materials without causing harm. This breakthrough could lead to new security measures, such as detecting weapons or drugs concealed on a human body, as well as medical applications, including material studies and biology.
A new study reveals how our brains fill in gaps to create continuous sound by suppressing slow brain waves during interruptions. This mechanism enhances our understanding of human hearing and may inspire future devices for people with hearing deficits.
Researchers propose EIT wave analysis as an alternative approach to measure the solar coronal magnetic field. They demonstrated that the profile of EIT wave propagation velocity can be utilized to probe the coronal magnetic field, potentially unveiling the nature of solar flares and CMEs.
Researchers at Berkeley Lab developed the first acoustic hyperlens, allowing for 8-fold magnification of sound-based imaging technologies. The device resolves details smaller than one sixth the length of the waves themselves, enabling new applications in medical ultrasound and underwater sonar.
Researchers at Caltech have created a nanoscale crystal device that confines both light and sound vibrations in the same tiny space. This enables the manipulation of sound and light waves with frequencies as high as tens of gigahertz, opening up potential applications in lightwave communication systems, biosensors, and more.
Dr. Dentcho Genov's research, published in Nature Physics, explores the link between metamaterials and celestial mechanics to investigate phenomena like black holes in a controlled laboratory environment.
Researchers at Fraunhofer Institute for Digital Media Technology IDMT created ultra-flat loudspeakers with resonant properties, enabling improved sound quality. The new design allows for integration into surroundings without sacrificing audio quality.
Researchers have developed acoustic tweezers that can position single cells or nanosized beads using sound waves, allowing for efficient manipulation without damaging live cells. The technology has significant advantages over existing methods in terms of versatility, miniaturization, and power consumption.
Researchers create new cloaking technique that uses electromagnetic fields to protect objects from incoming waves. The method has potential applications in shielding submarines, planes, buildings and coastal structures from various threats.
Researchers create Saser, a sonic equivalent to lasers producing ultra-high frequency sound waves on a nano scale. The new device has potential applications in computing, imaging, and anti-terrorist security screening.
Researchers at the University of Nottingham are developing revolutionary ultrasonic nanotechnology that can image individual cells. This technique could help diagnose serious illnesses such as some cancers by providing detailed insights into cell structure and function.
The 157th ASA Meeting explores various disciplines and unique sounds. Wimps hear dangerous noises differently due to physical fitness, while fish living in darkness have exceptionally sensitive ears. Researchers also study medical devices using sound to treat disease, a long-gone whale's comeback, and cowards' evolution.
The US Department of Homeland Security's study on Brain Music aims to enhance emergency response performance through neurotraining. Human Bionics LLC creates customized music compositions from brain waves to promote relaxation, alertness, and productivity.
Researchers at University of Warwick have developed a groundbreaking new loudspeaker technology that delivers planar directional sound waves, projecting further than conventional speakers. The 'Flat, Flexible Loudspeaker' (FFL) is lightweight, inexpensive to manufacture and can be concealed inside ceiling tiles or car interiors.
Tokuo Yamamoto, a University of Miami marine acoustics expert, won the 2008 Alan Berman Research Publication Award for his work on velocity dispersion and attenuation in New Jersey Shelf sediments. The award recognizes his research on high frequency acoustic waves interacting with silty-sand marine sediments.
Engineers at Vanderbilt University's Institute for Software Integrated Systems developed a system that combines information from multiple nodes to triangulate on shooter positions, improving accuracy. The system uses acoustic signals produced by high-powered rifles to track shooters in real-time.
Scientists at Lawrence Livermore National Laboratory have developed a new technique that converts high-frequency sound waves into light, allowing for more accurate characterization of semiconductor devices. This method has the potential to improve the manufacturing process for computer chips, LEDs, and transistors.
Scientists from Jülich and Göttingen have successfully visualized bulk Fermi surfaces using scanning tunnelling microscopes. This breakthrough enables direct insight into the properties of metals.
The University of Miami's Rosenstiel School of Marine, Atmospheric, and Earth Science has received a $3.75 million grant from the Office of Naval Research to support satellite-based research in the Western Pacific Ocean. The project aims to better understand typhoons, internal waves, and coastal processes using satellite data.
A team of Duke University engineers has developed a new type of cloaking device using complex mathematical algorithms to guide the design and fabrication of exotic composite materials. The device successfully cloaks electromagnetic waves, bending them around an object to create an 'engineered mirage'.
A new, portable ultrasound device created by Cornell graduate student George K. Lewis can treat prostate tumors and kidney stones by breaking them up, while also relieving arthritis pressure. The device is smaller, more powerful, and less expensive than traditional models, paving the way for its use in hospitals and medical research labs.
Soundararajan and Roman Holowinsky prove a significant version of the quantum unique ergodicity (QUE) conjecture using different techniques from number theory. Their work shows that for certain shapes associated with number theory, waves always spread out evenly, eliminating whispering galleries.
Engineers at Georgia Tech Research Institute create a new approach to noise reduction using micro honeycomb structures that dissipate acoustic waves through viscous shear. The innovative material, developed from nickel-base superalloys, could also protect aircraft from impact by dispersing energy.
Researchers at Lawrence Livermore National Laboratory have developed a new technique to visualize high-frequency acoustic waves in nanostructures, such as LED lights. By combining molecular dynamics simulations with terahertz (THz) radiation, they can detect these waves and gain insights into the dynamics of crystals under ultra-high s...
The Acoustics '08 conference in Paris features a range of topics, including a clinical assessment of blood vessel ultrasound and its potential to detect vulnerable plaques. The conference also explores the acoustic properties of Stradivarius violins and their modifications for modern playing styles. Additionally, there will be presenta...
Researchers in Spain have successfully created an acoustic cloak using metamaterials, which can make objects completely impervious to sound waves. The technology could be used for various applications such as warships to avoid sonar detection or concert halls to direct noise away from problem spots.
A study at Vanderbilt University establishes a direct link between cochlea curvature and low-frequency hearing limit, providing new insights into the evolution of hearing. The research found that spiral-shaped cochleae are exclusive to mammals and have a significant effect on hearing ranges.
Researchers at MIT are exploring a new method to measure hurricane strength using underwater microphones, which could lead to cheaper early-warning systems. The approach was validated by measurements from Hurricane Gert in 1999, providing accurate results comparable to aircraft-based methods.
A new imaging technique helps demystify the cause of explosive sound waves in rockets, revealing spinning acoustic waves that gain destructive power as they rotate around the combustion chamber. The study provides a clearer understanding of this phenomenon and brings scientists closer to preventing its occurrence.
A new study contradicts a prevailing belief about otoacoustic emissions, revealing they travel through fluid in the inner ear rather than rippling along the basilar membrane. The findings offer insight into hearing loss and could lead to the development of tools to detect damage.
Researchers at Duke University have successfully created a three-dimensional sound cloak in theory, allowing sound waves to travel around it undistorted. This breakthrough could lead to improved acoustics in concert halls and hidden submarines from sonar detection.
Researchers at the University of Liverpool have developed a mathematical model that proves it is possible to gain full control of sound waves using meta-materials. This could lead to improved medical scans, such as ultrasound technology used in pregnancy tests, and quieter noisy machines by trapping sound.
Scientists have discovered that sound waves can trigger earthquakes in a laboratory setting, inducing aftershocks long after the initial quake. This finding has significant implications for understanding earthquake behavior and may provide clues to catastrophic events in other granular media.
A team of researchers at Duke University has successfully transferred encoded information from a laser beam to sound waves and back again, opening the door for ultra-fast optical communications networks. The new method uses stimulated Brillouin scattering to create acoustic vibrations that can retain data for brief intervals.