Articles tagged with Acoustic Waves
Researchers have created a new map of medium-scale travelling ionospheric disturbances (MSTIDs) to better understand their impact on radio signal distribution. MSTIDs are huge wave perturbations that can interfere with radio signals, and this study provides valuable insights into their structure and behavior.
Researchers at MSU develop a magnetic waveguide to sort and store neutrons based on their quantum state, enabling spintronics research. The breakthrough uses magnetic reflection to separate neutrons with different spins, opening up new possibilities for studying electronic devices.
Researchers at Caltech created bacterial cells that can reflect sound waves, allowing them to visualize and locate therapeutic bacteria in the body. This technology uses ultrasound machines to generate images of bacterial cells, enabling doctors to assess treatment efficacy.
Researchers found that simulated anthropogenic noise exposure physiologically impacted blue crabs and lobsters, causing increased stress responses. The study also revealed behavioral impacts, including aggressive behaviors and reduced feeding, highlighting the need for environmental permitting in coastal areas.
Scientists studying submarine volcanoes have discovered distinct sound patterns emanating from two underwater eruptions, Ahyi and Bogoslof. These sounds can be detected by seismometers and hydrophone arrays, providing valuable insights into the monitoring of these volcanic events.
Scientists have identified a common plasma wave as the cause of high-energy electron loss into Earth's atmosphere. Whistler mode chorus waves are created by fluctuating electric and magnetic fields, efficiently accelerating electrons. The findings provide an important piece of the puzzle to understand space weather predictions.
Scientists have developed a new method to locate the precise time and location that objects fall into our oceans using underwater microphones. The method relies on measuring acoustic gravity waves generated when an object hits the sea surface. Researchers validated their method by locating recent earthquakes in the Indian Ocean.
A new method to control the momentum of broadband light has been demonstrated in a widely-used optical component known as a whispering gallery microcavity. This breakthrough enables coupling of all color lights with a single optical coupler, paving the way for applications in optical quantum processing and photonics.
A new origami lattice prototype can potentially reduce acoustic noise on roadways by selectively dampening noise at various frequencies. The technique allows researchers to adjust the distance between noise-diffusing elements, reducing noise levels by up to 90%.
A research team from SUTD developed a highly accurate single cell level sorting technology using sound waves, which enables the isolation of rare cell populations in complex biological samples. This technology has the potential to advance precision medicine for cancer treatment by examining DNA mutations at single cell level.
Researchers have developed a framework to identify key patterns that precede extreme events in complex systems. The method combines equations and data analysis to predict precursors, achieving high accuracy rates in simulations.
Scientists have devised a way to intercept exosomes from blood using microfluidics and sound waves, which can be used to diagnose problems like cancer or fetal abnormalities. The new device analyzes patient blood samples for rapid diagnosis in under 25 minutes.
University of Sydney researchers have achieved a groundbreaking breakthrough in transferring digital information between light waves and sound waves on a microchip. The innovation enables faster processing and reduces energy consumption by slowing down data transfer velocity to five orders of magnitude, making it suitable for use in te...
Researcher Benjamin J. Perrin is advancing knowledge of age-related hearing loss by exploring the function of sensory cells in the inner ear. He hopes to develop a maintenance-of-living-cells approach to prevent or restore hearing loss, with implications for millions of people.
Scientists have developed a method to control magnetic properties of materials using surface acoustic waves, which can induce rapid changes in strain and magnetization. This technique has the potential to enable low-power magnetic devices, which is key to developing memory, computing, and communication devices at the nanoscale.
A new study provides in-depth analysis of human mouth clicks used in echolocation, revealing brief and focused clicks with distinct acoustic patterns. The findings enable the creation of virtual human echolocators, allowing researchers to investigate object features without impractical measurements.
Computer scientists at the University of Washington have developed CovertBand, a software that can transform smart devices into active sonar systems, tracking personal activity and movements through walls. The technology uses repeating pulses in the audible range to gather detailed data on body position and movements.
Researchers have developed a new technique to suppress scattering from material defects, improving the performance of sensors and communication systems. By inducing chirality in sound waves, they can reduce energy loss and increase data fidelity.
Scientists develop a phononic crystal structure that can steer and guide surface acoustic waves, or 'nanoquakes,' in devices. The breakthrough could pave the way for lab-on-a-chip biosensors and earthquake protection.
Scientists have discovered evidence of a type of seismic wave in the Sun using data from NASA's SOHO. The waves, called g-modes, reveal that the solar core is rotating approximately once every week, nearly four times faster than its surface.
A new NASA study using data from the Van Allen Probes spacecraft has discovered that plasmaspheric hiss waves are more complex than previously understood. Low-frequency hiss waves interact with high-energy particles and can efficiently remove them from the radiation belts, protecting satellites.
Researchers at NASA's Goddard Space Flight Center are analyzing the eerie sounds made by plasma waves in space, including whistler-mode waves and chorus waves. By understanding how these waves interact with particles, scientists can improve predictions of space weather and protect satellites and telecommunications signals.
Researchers studied the Sun using sound waves to find that its significant magnetic activity layer has grown thinner in recent years. This change is being investigated as a possible cause of unusual solar activity.
Researchers have developed a new photoacoustic technique that can detect gases at the parts-per-quadrillion level using three resonances to amplify the signal. This breakthrough enables the detection of low-concentration pollutants and has potential applications in environmental monitoring.
Researchers at Berkeley Lab found a way to pack more data in single acoustic beams for underwater communications, increasing information transmission rates. They demonstrated this by encoding binary data onto an acoustic signal, effectively increasing the amount of information that can be transmitted.
Researchers have developed a new approach to remedy the problem of hard-to-reach organs, such as the liver, by analyzing the natural shear waves produced biologically. Passive elastography uses this technology to measure tissue elasticity and diagnose cancer at an early stage.
A team of investigators created a device that removes audible alarm sounds while preserving speech, aiming to enhance ICU patient recovery. The device was tested in a simulated environment and showed clinical improvement in alarm filtering.
A recent study by the American Institute of Physics reveals that high-frequency quasi-electrostatic fluctuations in the Earth's radiation belts are driven by hot electrons. These fluctuations allow radiation belt electrons to remain inside the outer Van Allen band for a long time, influencing radiation exposure for orbiting satellites.
Scientists at Berkeley Lab demonstrated how particles synchronize in response to acoustic waves, exhibiting a phononic bandgap that emerged only when collectively organized. The study provides a simple platform to study non-equilibrium systems and could lead to the development of intelligent networks with sentient-like decision making.
Scientists have discovered that organic crystals send out acoustic signals when their crystal structure changes, providing insight into the phenomenon. The crystals' rapid transformation of heat into movement is potentially useful for developing artificial muscles or microscale robotic arms.
Researchers at Brookhaven Lab create method to track dynamic molecular features in soft materials, enabling control of vibrational waves and flow of energy. The technique has potential applications in thermal and acoustic insulators, waste heat conversion, and light-mechanical motion.
Researchers developed a silicon photonic device that can exploit the scattering of light by mechanical vibrations, called Brillouin scattering. The device uses two silicon microdisks with tiny cavities, enabling light and mechanical waves to interact at high frequencies.
Researchers from NC State University developed an ultra-thin sound diffuser that is 10 times thinner than existing designs, reducing echoes and improving sound quality. The new design uses less material and takes up less space, making it lighter and less expensive.
A recent study found that learning to play an instrument alters brain waves, improving listening and hearing skills in older adults. The study demonstrates the brain's ability to rewire itself and compensate for injuries or diseases.
The study found that Ormia's mechanically-coupled hearing system prevents it from using spatial release from masking, which improves signal detection in noisy environments. This limitation affects the fly's ability to navigate complex situations and may have implications for developing artificial sensors.
Researchers at Chinese Academy of Sciences create first underwater acoustic carpet cloak using transformation acoustics, controlling sound wave propagation. The carpet cloak, composed of layered brass plates, successfully mimics a reflecting plane and makes the cloaked object imperceptible to sound detection.
Physicists at Brigham Young University have developed an acoustic technique called time reversal that uses targeted sound vibrations to knock over Lego figures. This technology has far-reaching implications for fields like private communication, targeted noise cancelation, and even medical treatments such as destroying kidney stones.
Researchers at UC Berkeley argue that restorative deep sleep is vital for warding off memory loss and a range of mental and physical disorders in older adults. The aging brain's decline in slow wave sleep and neurochemical regulation can lead to cognitive and physical impairments.
A new study from Northwestern University finds that sound wave stimulation synchronized to brain waves triples memory scores in older adults and enhances deep sleep. The technique, which uses real-time brain wave analysis, shows promise as a non-meditation approach to improving brain health.
A team of University College London researchers created a method for generating ultrasound via the photoacoustic effect by tailoring optoacoustic surface profiles. They used 3D printing to create samples with specific shapes, allowing them to control where sound fields would focus and even create continuous shapes.
Researchers have invented a super-material that bends, shapes and focuses sound waves, pushing the boundaries of metamaterials. This innovation has the potential to revolutionize medical imaging and personal audio, allowing for precise control over sound waves.
A team of scientists, led by Richard Spalding, discovered that the brilliant pulsating light emitted by burning asteroids can heat surrounding objects and generate sounds. This phenomenon, known as photoacoustic coupling, produces faint sounds similar to rustling leaves or whispers.
Researchers at Duke University have developed a tiny device that uses sound waves to create whirlpools to gather proteins and other biomarkers from blood, urine or saliva samples. This innovative technology has the potential to form the basis of a small, inexpensive point-of-care device for early disease diagnosis.
Researchers propose firing deep-ocean sound waves at oncoming tsunamis to dissipate energy and reduce amplitude. This process could minimize damage and save lives, but poses technical challenges including devising accurate frequency transmitters.
Researchers have developed a 3D printable sonic tractor beam that can trap small beads, insects, and even biological samples using sound waves. The device is created by designing a metamaterial with tubes of different lengths, which shape the sound waves to create a trapping environment.
Researchers developed a method to continuously assess the aging of materials in high-radiation environments, speeding up testing and reducing material replacement. Transient grating spectroscopy induces acoustic waves that reveal subsurface defects, allowing for real-time monitoring without physical contact.
A team of geophysicists has reconstructed the terminal phase of the collision between North America and Gondwana, revealing a 300km-long shear zone that stretches from Alabama to Florida. This discovery provides new insights into the formation of the southern Appalachians and has implications for understanding mountain-building processes.
Andras Vasy's prize-winning paper resolves a 35-year-old conundrum in geometric scattering theory, developing a systematic framework for analyzing certain partial differential equations. The paper has had a major impact and stimulated subsequent research, including Vasy's own work.
Acoustic waves were used to manipulate fluids in nanoslits, enabling the creation of small, portable devices for sorting cells, filtering particles, and sensing biological components. The technology has the potential to revolutionize fields like drug discovery and microrobotics.
Researchers from Woods Hole Oceanographic Institution discovered a previously unknown element of whale songs, particle motion, which could travel further than expected. This finding raises concerns about potential interference with whale communication due to human-made noise in the ocean.
Researchers have developed a new 3-D printed device that can harness high-pressure ultrasound to manipulate tiny objects like particles, drops or biological tissue. This control enables precise applications in surgery, material analysis and scientific research.
Researchers found that supersonic solitary waves in nano-electronics crystals can be used for electric charge or matter transport and energy storage with extremely low heat dissipation. These localized excitations could lead to the development of transistors without silicon, revolutionizing the field of nano-electronics.
Researchers at Duke University have developed a simple, energy-efficient way to create three-dimensional acoustic holograms using Lego-like metamaterials. The technique manipulates sound waves into desired patterns, enabling applications such as improving sound quality in speakers and creating realistic ultrasound images.
Researchers at Southwest Research Institute successfully demonstrated a low-cost miniature solar observatory on a six-hour high-altitude balloon mission. The SwRI Solar Instrument Pointing Platform (SSIPP) collected data on solar soundwaves, which are undetectable by ground-based observatories due to their high frequency.
A new study suggests that sound plays a limited role in attracting coral larvae to reef systems. By recording particle motion using accelerometers, researchers found that the signal drops rapidly below levels detectable by most marine species just a few meters away from the reef. This finding challenges previous studies and highlights ...
A team of scientists engineered protein-shelled nanostructures called gas vesicles to exhibit properties useful for ultrasound technologies. The modified gas vesicles were shown to produce distinct signals, target specific cell types, and help create color ultrasound images.
Researchers at the University of Arizona are pioneering phononics, the science of sound, with potential repercussions in fields like energy, biomedicine, and computing. The team, led by Pierre Deymier, is using unconventional materials to manipulate sound waves in new ways.
The National Science Foundation has awarded $18 million to nine teams of engineering-led researchers to pursue transformative research in new light and acoustic wave propagation. The goal is to disrupt conventional ways of designing electronic, photonic, and acoustic devices and enable new functionalities.
Computer models reveal a vast array of knots in chaotic waves, including those tabulated by mathematicians, with implications for understanding optical and acoustic landscapes
Researchers at Vienna University of Technology and colleagues around the world have discovered exceptional points in wave physics, where complex frequencies emerge. By steering a system around these points, they have observed surprising effects, including asymmetric mode switching.