Articles tagged with Acoustic Waves
Researchers have created a device that can suspend two chemically distinct droplets in mid-air and mix them without physical contact. The technique uses acoustic levitation, which allows scientists to study various types of chemical reactions without the influence of containers or handling.
Researchers develop wireless ultrasound transducer that uses microwave absorption to generate sound waves, avoiding acoustic losses. The device consists of a copper ring with an oil-filled envelope, which concentrates microwaves into a hot-spot for efficient ultrasound emission.
Physicist Andrea Alù leads a team of researchers in developing a unified theory for exotic wave transport in engineered materials. The goal is to create new devices and breakthrough technology with applications in wireless communications, biomedical sciences, and energy harvesting.
Researchers create microfluidic lab-on-a-chip that uses sound waves to manipulate and transport droplets, overcoming surface absorption issue. The device enables on-site diagnostics or laboratory research with minimal energy and complex setup.
A Cornell University team has discovered a way to control electron spin transitions using acoustic waves, eliminating the need for magnetic fields. This breakthrough enables the development of smaller, more power-efficient acoustic sensors for navigation technology and other applications.
A research team from the University of Göttingen has successfully harnessed the 'whispering gallery' effect to control electron beams using light. This breakthrough enables new possibilities for quantum technologies in nanoscale sensing and microscopy.
Scientists at the University of Tsukuba developed a new anti-counterfeiting system using whispering-gallery waves and dye particles, creating a unique color pattern that can't be duplicated.
Researchers created a fast, precise and scalable method for individual nano- and submicron scale manipulation in acoustic fields using megahertz frequencies. The technology isolates submicron particles, enabling sorting, patterning and size-selective capture of nanoscale objects.
Researchers propose a scheme to realize selective directional coupling of near-field longitudinal waves based on inherent geometric properties and symmetry analysis. The work enables the creation of Janus and Huygens sources, which selectively couple with one side or two sides of the near-field pattern, respectively.
Scientists use sound and light to store and transfer information on microchips, extending the lifetime of phonons from nanoseconds to 40 nanoseconds. This breakthrough opens possibilities for optical signal processing, fine filtering, high-precision sensing, and telecommunications.
Researchers at TU Wien and Stanford University have created tiny neuronal networks by printing 3D cages with microscale openings using two-photon polymerization and acoustic bioprinting. This allows for the growth of multicellular nerve tissue and the creation of connections between neurons, enabling targeted study of neural networks.
Researchers have developed a method using phononic crystals to generate tunable, time-variant sound fields that can trap and transport particles and cells in microchannels. This technology has potential applications in display technology, biomedical sensors, and diagnostic tools.
A new Australian study uses sound waves to probe the unique properties of an ultracold quantum gas, a model system for certain superconductors and nuclear matter. The research reveals strong variations in sound wave behavior as a function of temperature.
Researchers have developed unified formulas to predict the behavior of light and sound waves in heterogeneous materials. This allows for the design of multifunctional composites with specific responses to waves, paving the way for engineered hyperuniform materials.
Magnetoacoustic waves have been directly observed and found to travel long distances with larger amplitudes than expected. The findings open up new avenues for manipulation of these waves at room temperature, making them suitable for carrying information or driving small motors.
Researchers used electroencephalography to monitor brain activity while participants made decisions. Weaker alpha waves indicated resisting the bias, while stronger waves signaled succumbing to it. This study demonstrates that neural signals can predict individual biases in perception.
Researchers have created a device that uses sound waves to produce high-resolution images of the human brain, potentially revolutionizing brain imaging. The technology could be suitable for continuous monitoring of high-dependency patients and overcome obstacles with current MRI methods.
Researchers have developed an algorithm that uses the transit time of sound waves to assign echoes to specific walls. The drone's six degrees of freedom are sufficient for optimal microphone placement, reducing ghost wall detection. This innovation opens a new pathway towards practical applications in various fields.
Researchers at the University of Innsbruck have developed a method to cool microparticles using sound waves, enabling quantum experiments without photons. This innovative approach also provides a path to probe and manipulate exotic dynamics of acoustic and magnetic waves in small particles.
Researchers have demonstrated the ability to break reciprocity in acoustic waves using spacetime-varying metamaterials. The materials' properties change simultaneously in time and space, allowing for non-reciprocal wave behavior. This breakthrough has potential applications in fields like communications, medicine, and electronics.
Researchers found binaural beats do not alter mood, contrary to popular claims, and instead synchronize brain waves like other sounds. Brain activity synchronized with both types of beats, but monoaural beats had a stronger effect.
The researchers create a device that uses surface acoustic waves and industry-compatible fabrication processes to transport individual electrons one by one, recombining them with holes to produce single photons.
Researchers at Tomsk Polytechnic University have successfully created a new type of curved acoustic wave beam, known as an acoustical hook, which can be used to manipulate nanoparticles with high precision and accuracy. This innovation has the potential to revolutionize fields such as biomedicine and materials synthesis.
Researchers found that brain activity in healthy adults synchronized with sound waves produced by a silent woman speaking, indicating the brain can process auditory information from visual cues. This ability arises from visual cortex activity synchronizing with lip movement and signal transmission to other areas for sound synthesis.
Researchers have developed a noncontact laser ultrasound technique that generates and detects sound waves on the skin surface using eye- and skin-safe lasers. This method produces images with centimeter depths, comparable to clinical ultrasound, and shows sensitivity to tissue features currently detected by conventional ultrasound.
MIT engineers develop new laser ultrasound technique that remotely images inside a person, eliminating the need for direct contact. The method uses sound waves generated by a laser to create images comparable to conventional ultrasound, with potential applications in imaging infants, burn victims, and accident survivors.
Scientists have successfully detected seismic waves using submarine telecommunications cables, which can also detect earthquakes, swell, and underwater noise. The researchers deployed a 41 km-long cable to retrieve data from an underwater observatory, converting it into over 6000 seismic sensors.
Chen WeiQiu's team discovers a way to tailor topological states in acoustic materials by selecting specific boundaries, enabling dual-channel propagation and one-way propagation of sound waves. This breakthrough leads to the design of tunable acoustic devices with new possibilities.
A new device uses acoustic focusing to gather microplastics in water, promising a practical solution to the pollution problem. The device collects particles of different sizes and types with high efficiency, showing promise for future improvements.
A new study by Benoit Tallon and colleagues found that schools of fish scatter sound waves, which affects the evaluation of fish biomass in aquaculture. The research uses mesoscopic physics to estimate the biomass of wild fish schools in their natural environment.
Acoustical Society of America researchers present a new approach to deploying human-scale immersive virtual environments, combining wave field synthesis with modular design for scalable configurations. The system enables rapid assembly, calibration, and deployment in various settings, such as schools, offices, or research institutes.
Researchers created a system to convert light waves into sound waves by correlating bright lines within atomic spectra to audible tones. This allows for the creation of individual atom notes and even entire songs, enabling listeners to experience an 'atomic world' through sound.
A team led by Queen's University Belfast scientist Dr. David Jess discovered that the Sun's magnetic waves strengthen and grow due to the formation of an 'acoustic resonator', where temperature changes create boundaries that trap the waves, allowing them to intensify.
Researchers have successfully controlled the optical properties of semiconductors using acoustic waves at room temperature. This breakthrough enables the dynamical manipulation of excitonic properties at high speed, opening up new avenues for applications such as acousto-optic devices and sensor technology.
Southwest Research Institute successfully demonstrated a miniature solar observatory on a high-altitude balloon, collecting 75 minutes of solar images. The SwRI Solar Instrument Pointing Platform provides optical precision equivalent to imaging a dime from a mile away, supporting the development of custom solar instruments.
Researchers have discovered that surface waves can spread on water-glass boundaries, creating a phenomenon that could be used to pulverize kidney stones. The study uses an experimental system to visualize stress created by such waves.
A team of researchers analyzed data on large nearshore waves to provide insights that could help design coastal structures better withstand destructive waves. The study found that the extreme waves in shallow waters tend to be smaller than rogue waves in deep water but have similar characteristics.
Researchers at the University of Pennsylvania have designed microscale rockets that use sound waves to propel themselves through cellular landscapes. The tiny vessels are controlled using magnetic fields and can move particles and cells with high precision.
A team of neuroengineers at Columbia University has uncovered the steps that take place in the brain to pick out one voice from among many. The auditory cortex, the brain's listening center, decodes and amplifies one voice over others at lightning-fast speeds, with two areas, Heschl's gyrus (HG) and superior temporal gyrus (STG), playi...
Researchers at Argonne National Laboratory used X-rays to observe spatial changes in a silicon carbide crystal when exposed to sound waves. The study demonstrates the potential of acoustic interactions to change materials at the atomic level, paving the way for novel techniques in quantum information technologies.
Researchers found low-velocity pockets along the rifting axis indicating areas filled with gas, raising concerns about environmental implications. The trapped gas could be a potential untapped natural resource or contribute to greenhouse gases if released.
Scientists create a physical model of porpoise echolocation using hybrid metamaterials, which improves detection accuracy and suppresses environment noise. This breakthrough bridges the gap between biosonar and artificial systems, paving the way for bioinspired technology in underwater sensing and nondestructive testing.
The researchers used acoustic waves in a classical environment to demonstrate nonseparability without the time limitations and fragility of quantum information processing. This approach has the potential to bring significant improvements in data processing efficiency and stability.
Researchers at Bar-Ilan University have developed a new concept that combines light and sound waves in standard silicon chips, achieving delays of tens of nano-seconds without introducing additional materials. This breakthrough enables the selective processing of sound waves, which is difficult for electronics and optics alone.
Researchers have successfully stored and released mechanical waves without losing energy, paving the way for improved technology in structural integrity monitoring, energy harvesting, and quantum computing. This breakthrough has significant implications for efficient wave propagation and control.
The MIT team has created a submerged system that harnesses the vibration of 'piezoelectric' materials to generate power, transmit data, and receive signals without batteries. This technology enables long-term underwater sensing for climate change research, marine life tracking, and potential applications on other planets.
Researchers have developed a new generation of integrated circuits that utilize the interaction between light and sound to revolutionize 5G networks, sensor systems, satellite communication, radar systems, and radio astronomy. This third-wave technology offers immense technological applications and opportunities for pure scientific inv...
A study published in Journal of Memory and Language found that the voice carries indexical information that affects access to word meaning. Researchers determined that cognitive representations of words contain non-linguistic information about the speaker's voice, which influences mental lexicon development.
Researchers discovered that southern right whale mothers and their calves shelter in noisy surf, staying close and whispering softly less than once per dive to avoid attracting unwanted attention. The pounding waves drowned out the soft calls, providing acoustic cover from killer whales.
A small pilot study found that sound stimulation played during specific times of deep sleep enhanced slow-wave sleep in people with mild cognitive impairment. Participants who showed the greatest improvement in deep sleep also recalled more words on a memory test the next morning.
Researchers at TU Wien have developed a method to manipulate the 'branched flow' of waves, which can be exploited to send waves along specific paths. The technique uses numerical simulations to calculate the optimal wave shape and can be applied to various types of waves, including light, sound, and sonar waves.
Researchers observe acoustic spin in airborne sound waves, leading to new physics and applications for emerging topics in fundamental physics and acoustics. The discovery enables the control of particle rotation with torque and holds promise for acoustic communication.
Researchers used a two-dimensional acoustic array and convolutional neural networks to detect and analyze sounds of human activities and identify them with high accuracy. The tests achieved an overall accuracy of 97.5% for time-domain data and 100% for frequency-domain data.
Scientists from RMIT University have created a clean, green technique to produce customised MOFs in minutes, harnessing the precision power of high-frequency sound waves. This innovative approach avoids traditional methods' environmental impacts and produces ready-to-use MOFs quickly and sustainably.
A new smartphone app has been developed to detect fluid buildup in the middle ear, a common cause of ear infections in children. The app uses machine learning to analyze sound waves and determine the likelihood of fluid presence, showing promise as a quick and non-invasive screening tool.
A French researcher has developed a proof of concept for a smartphone-based shooter location system that uses acoustic analysis to track the origin of gunfire. The system, deployed in TCAPS hearing protection devices, analyzes the supersonic shock wave and muzzle wave generated by bullets to determine the shooter's direction.
Researchers have discovered that tsunami-like solitary waves, known as clusters, move in synchrony with each other. The findings were made possible by observing how the waves behave when they occur in a series, revealing intriguing patterns of movement and coordination.
Yale researchers have developed a new technology that allows sound to flow in one direction, enabling the control of acoustic resonators. This discovery offers possibilities for enhancing electronic devices that use these resonators. The technology also enables the controlled flow of heat from one object to another.
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.