Articles tagged with Acoustic Waves
Researchers at Queen Mary University of London have developed a composite material that can enhance specific properties on an object's surface, allowing curved surfaces to appear flat to electromagnetic waves. This practical demonstration could lead to improved antenna designs and applications in the aerospace industry.
Researchers create compact high sensitivity sensors using diamond microstructures, achieving record high microwave frequencies and quality factor. They proposed a mathematical model to select useful acoustic signals and decrease spurious peaks, paving the way for applications in various fields.
A Yale team has developed a new waveguide system that harnesses the interaction of light and sound waves to boost light intensity on a silicon microchip, solving a long-standing problem in hybrid technologies. The breakthrough enables precise control over the interaction, leading to potential commercial applications in fiber-optic comm...
Engineers have found a way to control light waves using a non-periodic material structure. This breakthrough opens up opportunities for faster-switching transistors and white light lasers, enabling devices to selectively block or allow specific wavelengths of light
Scientists at the Australian National University have created a new algorithm that can accurately predict tsunamis by analyzing real-time ocean sensor data. The Time Reverse Imaging Method takes data from sensors to recreate what the tsunami looked like when it was born, allowing for better predictions of its trajectory.
Scientists have developed a new imaging system that can produce three-dimensional images of the insides of arteries, revealing fatty arteries in all their detail. This breakthrough technology has the potential to help doctors diagnose plaque vulnerability in patients and better identify heart disease.
University of Minnesota researchers develop a new approach to studying turbulence in jets, revealing new coherent modes associated with high-speed jet dynamics. This discovery helps explain why jet engines produce such loud noise and could lead to new approaches for reducing volume levels.
Researchers at the University of Oregon have developed a way to control electron states using both light and sound waves, providing a potential breakthrough for quantum computing. This method uses sound waves to manipulate qubits, which are essential for building advanced quantum systems.
Researchers use refined techniques to detect and locate airwaves generated by volcanic explosions on seismic networks, providing an automated way to monitor volcanic eruptions. Ground-coupled airwaves can provide unambiguous evidence of eruptive activity and location of vents.
NIST researchers create a piezo-optomechanical circuit that converts signals among optical, acoustic and radio waves. The system enables manipulating motion of nanoscale beam using energy exchange between phonons and photons.
Researchers at Penn State developed an acoustofluidic rotational manipulation method that can rotate small organisms and cells using gentle acoustic waves. This technique enables 3D imaging of biological specimens without the need for expensive confocal microscopes.
Researchers have developed a new way to controllably manipulate biomolecules like DNA using acoustic force spectroscopy. The technique stretches molecules by applying varying forces in a precise way, shedding light on chemical bonding and mechanical properties.
Researchers at MIT have developed a general theory that connects gravity waves and acoustic waves, finding that surface-gravity waves can generate powerful acoustic-gravity waves under certain conditions. This energy exchange could play a role in water transport, carbon dioxide distribution, and sustaining a healthy marine environment.
Mathematicians Gino Biondini and Dionyssios Mantzavinos develop a new mathematical model describing wave patterns with small irregularities. Their research shows that many disturbances evolve into single-class wave forms, answering a question scientists have been trying to answer for 50 years.
Researchers at Technical University of Munich developed an universal mathematical model that describes how sound waves propagate through the internally coupled ears and which clues for localizing sound sources are created. This system enables animals to pinpoint sound sources, a mechanism applicable to over 15,000 species.
Researchers at CNRS and University of Lorraine develop a coiled-up acoustic metasurface that achieves total acoustic absorption in very low-frequency ranges. The absorber's deep-subwavelength thickness enables it to handle large wavelengths with reduced size structure, making it physically practical for most applications.
Researchers at Carnegie Mellon University have successfully used acoustic tweezers to manipulate single cells in three dimensions, paving the way for precise 3D bioprinting of complex multicellular structures. This breakthrough could lead to new applications in regenerative medicine and tissue engineering.
Researchers created a device that moves single cells in three dimensions using surface acoustic waves, enabling precise manipulation and structure building. The technology has potential applications in regenerative medicine, neuroscience, tissue engineering, biomanufacturing, and cancer metastasis.
University at Buffalo engineers are developing hardware and software tools to improve underwater telecommunication, increasing data transmission rates by up to 10 times. The technology has potential applications in monitoring pollution, military and law enforcement work, scuba industry, and energy industry.
Neural clocks have been found to exist and can be used to predict timing behavior in rats. Researchers identified a mechanism in the Striatum brain region where populations of neurons create sequences of activity that encode time.
Researchers at RMIT University have created a new class of sound wave that can be used to manipulate fragile stem cells without causing damage. The 'surface reflected bulk waves' are gentle enough for biomedical devices and open up new possibilities in stem cell treatment.
A new analysis helps consumers choose energy-efficient appliances to save money and water. Meanwhile, a Himalayan glacial lake threatens to flood a Buddhist holy city due to melting ice and rock barriers. Ocean sounds are also being used to measure stratospheric winds with precise data analysis.
Scientists used a Baghdad seismometer to capture data on car bombs and mortar fire during the Iraq war. They identified distinct seismic signatures for different types of military operations in urban terrain, such as vehicle-borne improvised explosive devices and mortar fire.
Researchers have developed a metamaterial that can more than double the resolution of acoustic imaging, focus acoustic waves, and control angles. This breakthrough has potential applications in medical diagnostics and structural integrity testing.
Physicists at UCLA's LAPD successfully recreated whistler-mode chorus waves, previously only observed in space, to study the excitation process and its implications for satellite safety. The experiment reveals a complex interplay of plasma parameters and wave signatures that provide an unprecedented constraint on theoretical models.
Researchers at SLAC National Accelerator Laboratory discovered a surprising 3-D effect in a superconducting material, resolving an apparent mismatch in data and charting a new course for understanding electrons in these exotic materials. The study revealed a newly found type of 'charge density wave' closely tied to high-temperature sup...
A new method using sound waves can detect cell stiffness changes that could signal disease, such as cancer and autoimmune disorders. The technique uses low-frequency ultrasonic waves to levitate cells and high-frequency ultrasonic waves to measure their stiffness.
A new method of moving data in racetrack memory uses sound waves, overcoming limitations of traditional methods. The study, published in Applied Physics Letters, demonstrates the potential for faster computing by utilizing surface acoustic waves to transport data quickly and efficiently.
Scientists developed a more general approach for controlling acoustic scattering on complex, odd-shaped objects using a coating of two thin fluid layers. The coating significantly reduces the scattering strength, allowing for ideal acoustic measurements in laboratories.
A team of researchers has created a working sonic tractor beam that uses high-amplitude sound waves to generate an acoustic hologram, allowing them to lift and move small objects. The technique could be developed for applications such as transporting delicate objects or gripping drug capsules through living tissue.
A team of researchers from Caltech and the University of Cambridge discovered that booming and burping sounds emanating from sand dunes are different acoustic phenomena governed by distinct physical principles. The study found that booming sounds originate from linear P-waves, while burping sounds correspond to surface Rayleigh waves.
A team of researchers from UC Riverside and the University of Augsburg developed a technique to analyze novel two-dimensional semiconductors by creating high-frequency sound waves on lithium niobate substrates. This allows for the detection of changes in electric properties of the material when illuminated with laser light.
Researchers used asteroseismology to probe magnetic fields in the cores of red giants, finding them strongly magnetized. The strong fields disrupt gravity waves, causing energy loss and affecting star evolution.
Allan D. Pierce, Professor Emeritus at Boston University, has been awarded the Acoustical Society of America (ASA) Distinguished Service Citation for his outstanding service to the organization. Pierce received the citation in recognition of his 15-year tenure as Editor-in-Chief.
A team of researchers developed a cell sorter based on acoustic waves that can compete with existing fluorescence-activated cell sorters, sorting up to 13,000 cells per second while gently manipulating individual cells. The device is compact, inexpensive, and preserves cell viability and functions.
Researchers at ETH Zurich developed a new type of acoustic imaging device that extracts contour information during measurement, creating detailed outline images of objects. The method uses evanescent waves and is useful for quickly recording relevant information about objects.
A new sensor developed at Duke University uses metamaterials and compressive sensing to separate overlapping sounds in loud environments. The device achieved a 96.7% accuracy rate in distinguishing between three identical sounds sent from different directions.
Chinese scientists created a tunable membrane material that effectively recreates the quantum tunneling effect for sound waves. The material has an effective density near zero and enables high transmission around sharp corners and efficient wave splitting.
Researchers at the Centre for Genomic Regulation have developed Brain Polyphony, a device that produces sounds from brain signals, allowing people with cerebral palsy to communicate their emotions. The system uses real-time analysis of brain waves to translate into code words, providing an alternative communication method.
Thermal phonons can interfere with their own reflections, suggesting that heat transport occurs through wave-like phenomena. This interference could be used to modify the velocity of phonons and create energy bandgaps, leading to new materials with low thermal conductivity.
According to archaeo-acoustician Steven J. Waller, ancient cultures sought booming echoes in their performance spaces, rather than clear tones. This reflects a cultural difference between past and present worldviews, where echoes were once considered mysterious and divine.
Researchers successfully demonstrated cream separation from natural whole milk at liter-scales using ultrasonic standing waves, achieving fractionation outcomes desired for a particular dairy product. The technique allows for high volume throughputs of up to 30 liters per hour and can be used to specifically select milk fat globules of...
Scientists at NPL have developed a new optical method for directly measuring sound pressure, providing direct traceability to fundamental SI base units. This method can be used to calibrate any acoustic device without assumptions regarding geometry and sound field characteristics.
Researchers developed an acoustic-based microfluidic device to separate circulating cancer cells from blood samples with high accuracy. The device uses surface acoustic waves to push CTCs out of the fluid stream, making it a potentially game-changing technology for non-invasive diagnostics and treatment monitoring.
Researchers at VIMS have developed an underwater robot that uses acoustic signals to gauge the thickness of oil slicks, a crucial step in determining spill volume. The ROV will aid in testing oil-spill-response tools and provide a platform for developing other sensors.
A new system using sound waves helps detect structural defects in pipes, engines, and nuclear power plants. Researchers have developed a non-destructive testing method that could also be applied to medical imaging and seismology.
Researchers at EPFL have demonstrated that graphene exhibits quasi-lossless heat transfer, allowing it to propagate heat without significant losses even at room temperature. This discovery has valuable implications for the design of future electronic components.
Yale University scientists create a new system that combines photons and phonons to conduct sophisticated signal processing tasks, allowing for faster and more efficient information control. The technology has the potential to be less expensive and adaptable to various complex designs.
Researchers at the University of Sydney developed a method to selectively enhance or inhibit optical nonlinearities in photonic chips, which can be useful for both hindering and helping signal processing applications. This breakthrough uses a grating structure on chip scale devices to control optical nonlinearity.
Studies on lungfish and salamander hearing shed light on the evolution of aerial hearing in early terrestrial vertebrates, suggesting they could have detected airborne sound without a tympanic middle ear. The research provides insight into the development of hearing 250-350 million years ago.
Researchers at University of Illinois have demonstrated Brillouin Scattering Induced Transparency (BSIT), a phenomenon that can slow down, speed up, and block light in optical waveguides. BSIT uses sound waves to eliminate opacity and create a non-reciprocal behavior, enabling the creation of isolators and circulators.
Researchers at the University of Missouri have developed a material that can sense and manipulate sound and elastic waves. This technology could lead to advancements in imaging, military enhancements such as elastic cloaking, and super-resolution sensors.
A Brazilian team of researchers has developed a new levitation device that can hover tiny polystyrene particles with more control than any instrument before. The device uses sound waves to reflect off a concave reflector, allowing the particle to be moved around without precise setup.
The study establishes form-invariance of electromagnetic, sound, and elastic wave equations without assuming relations between field variables. New locally accurate elastodynamic equations for inhomogeneous media are derived, leading to the design of perfect elastic wave rotators and cloaks.
Researchers develop acoustic tweezers that can precisely position groups of cells for study, eliminating the risk of cell damage. The device achieves a throughput of thousands of cells and enables precise control over cell-to-cell contact, paving the way for studies on cellular communication and information transfer.
A research team from TUM discovered that birds use their oval-shaped heads to transform sound waves, allowing them to identify sounds from different elevation angles. This unique ability combines information from hearing and vision to improve orientation and evading predators.
Researchers discovered a counter-intuitive current induced by sound waves in a disordered environment. Noise fluctuations lead to directed electron transport behavior and current reversal, paving the way for innovative semi-conductor devices.
Researchers have developed a method to extract audio information from high-speed video recordings by detecting vibrations caused by sound waves. The technique, reported in the SPIE journal Optical Engineering, uses an image-matching process based on vibration from sound waves and can recover spoken words from videos.
A team led by UW-Madison is investigating the Laguna del Maule volcanic field in Chile's Andes, where a mega-eruption could be as large as Mount St. Helens. The team aims to document the volcano's behavior before an eruption using geology, geochemistry, and seismology techniques.
University of Minnesota engineers have developed a novel device platform that generates and confines both sound wave and light wave on a computer chip. This technology has the potential to improve wireless communications systems using optical fibers and could be used for computation using quantum physics.