Articles tagged with Acoustic Waves
Researchers at Max Planck Institute create a new optical fiber by freezing a liquid core in nitrogen, achieving extreme nonlinearities and optoacoustic memory. This breakthrough enables drastically reduced energy consumption for photonic computing architectures.
A Korean research team created an underwater acoustic lens capable of focusing sound precisely at a desired point while reducing weight by about 40% compared to conventional designs. The findings have significant implications for underwater communication, marine environmental monitoring, and acoustic energy transfer.
Researchers at UCSF built a robotic system to treat thousands of mini tumors, identifying shared features among persister cells that could help explain why cancer comes back. Nine drugs consistently weakened persister cells, suggesting common vulnerabilities.
Researchers developed meta-earplugs with Helmholtz resonators to address low-frequency sound issues. The earplugs use precise tuning of reflected sound waves to relieve pressure and increase protection.
A biologically inspired event camera measures vibrations accurately without expensive equipment, providing a cost-effective alternative to laser-based systems. The camera captures high-speed vibrations by recording brightness changes independently at each pixel, enabling precise amplitude, phase, and frequency estimation.
Researchers developed a device utilizing sound waves to detect helium by exploiting changes in sound velocity and resonant frequencies. The triangular Kagome structure allows for accurate detection of helium leaks, even at extremely low temperatures.
Researchers from Keio University Global Research Institute successfully generated orbital currents using sound waves, establishing a foundation for integrating acoustic technology with orbitronics. The discovery paves the way for next-generation electronic devices.
A team of researchers at Kyoto University has found that cells can hear and respond to sound waves, leading to potential applications in medicine and healthcare. The study used acoustic pressure to induce cellular responses, revealing the suppression of fat cell formation and activation of mechanosensitive genes.
University of Virginia researcher Natasha D. Sheybani has received a $5.5 million grant to advance her research on focused ultrasound technology for breast cancer immunotherapy. Her work aims to enhance the safety, effectiveness, and precision of immunotherapy drugs.
Scientists have developed an all-optical activation function based on sound waves for photonic computing, enabling the creation of energy-efficient artificial intelligence systems. This breakthrough could potentially facilitate the scaling up of physical computing systems and pave the way for more efficient optical neural networks.
Researchers studied dipole eddies in the South China Sea, revealing unique sound-speed structures and acoustic propagation patterns. The team found that warm-core AEs decrease temperature, salinity, and sound speed, while cold-core CEs increase these factors.
A breakthrough in medical technology, the wearable stethoscope accurately monitors lung sounds in real-time and detects wheezing. An AI-based algorithm classifies breathing sounds and counts wheezing events with high accuracy.
Researchers developed an equation describing pressure wave propagation in bubbly flows, confirming that changes in tube cross-sectional area contribute to pressure wave attenuation. The rate of change in tube cross-sectional area is a key parameter governing pressure wave attenuation.
Engineered materials mimic quantum behaviors, allowing for the simulation of Schrödinger dynamics in classical systems. This breakthrough enables the study of quantum phenomena in more accessible environments, paving the way for novel technologies.
Researchers at Nagoya University have discovered a unique sound stimulation technology that alleviates motion sickness, reducing symptoms by up to a minute of stimulation. The device stimulates the inner ear with a specific wavelength of sound, activating the vestibular system and improving balance.
Engineers at University of Bristol spin-out company Impulsonics have created a technology that can move cells using acoustic waves, enabling critical lab tasks to be carried out on a benchtop device. This innovation has the potential to accelerate drug discovery and unlock personalized medicine screening in clinics.
Researchers used hydroacoustic data to detect a possible submarine landslide in Trou Sans Fond Canyon offshore of Ivory Coast, which may have broken communications cables and disrupted internet traffic in March 2024. The detection could help identify threats to undersea infrastructure and inform engineering standards.
The POSTECH research team developed a smartphone-type OLED panel that can transform its shape while functioning as a speaker, maintaining ultra-thin flexibility. The panel uses electrically driven piezoelectric polymer actuators to achieve complex forms without mechanical hinges or motors.
Researchers at Indian Institute of Science use polarized light to measure glucose concentration with near clinical accuracy in water, serum solutions and tissue samples. The technique exploits the interaction between glucose molecules and polarized light to create unique sound wave patterns.
Distributed acoustic sensing systems face data processing speed limitations; researchers leverage photonic neural networks to overcome these challenges. The TWM-PNNA system achieves high recognition accuracy above 90% with low power consumption, outperforming electrical GPUs by orders of magnitude.
The study found that the 'pop' sound is caused by sudden expansion of carbon dioxide and air mixture in the bottle, as well as a strong cooling effect, resulting in high decibel emissions. The liquid level rises after opening, causing sloshing due to momentum transfer from the lid hitting the glass.
Scientists have developed a technology called 'audible enclaves,' which can create localized pockets of sound zones where only one person can hear. This innovation uses nonlinear ultrasonic beams to generate a privacy barrier between people for private listening, enabling sound and quiet zones.
Eliza Michalopoulou is leading a research project to improve ocean floor mapping using sound waves, aiming to understand the seabed's properties and characteristics. The goal is to enhance anti-submarine warfare strategies and contribute to global efforts like Seabed 2030 and Ocean Decade.
A study published in Physical Review Research reveals the intricate physical mechanisms involved in handclapping, including air flow, sound production, and resonance. The researchers found that the size and shape of the hand cavity affect the frequency of the clap, with cupped hands producing lower frequencies.
Exotic waves with tangible effects, known as Rayleigh–Bloch waves, have been found to transform into phantom-like entities above a certain cut-off frequency. At lower frequencies, these waves exhibit characteristic behavior around stainless steel struts, making them ideal for antenna design and potential communication purposes.
Researchers at Tohoku University discovered a novel propagation phenomenon in surface acoustic waves, leading to the development of innovative acoustic devices. The study, published in Physical Review Letters, reveals asymmetrical diffraction behavior that can be controlled using magnetic fields.
Researchers at Osaka Metropolitan University have found key indicators for assessing chemical activity and temperature of active bubbles generated by ultrasonic waves. The study provides new insights into the relationship between bubble temperature and chemical activity, enabling more precise control of chemical reactions.
The 'Bird Sonic' device, developed by Okayama University of Science, was installed at three Kansai airports to deter birds from flying over runways. The system uses high-frequency waves to reduce bird strikes and aims for 80-90% control by gradual reduction.
Researchers developed a miniaturized all-fiber photoacoustic spectrometer for intravascular gas detection, achieving detection limits of 9 ppb and response times as quick as 18 milliseconds. The system detects trace gases at the ppb level and analyzes nanoliter-sized samples with millisecond response times.
Researchers are revolutionizing fresco assessment with laser Doppler vibrometry, enabling the detection of hidden delaminated areas. This technology aims to democratize conservation expertise and create accessible tools for preserving these cultural treasures.
Researchers developed a new photoacoustic imaging technique that addresses skin tone bias in breast cancer detection. The technique, combined with specific wavelengths and beamforming methods, enhances target visibility across all skin tones, providing clearer images with improved signal-to-noise ratios.
Researchers at the Max Planck Institute have developed a novel method to entangle photons with acoustic phonons, overcoming noise susceptibility and enabling high-temperature operation. This breakthrough has significant implications for secure quantum communications and quantum computing applications.
Researchers at Tel Aviv University demonstrated that bats can navigate great distances in open areas with their eyes closed, using only echolocation. The study found that bats create an acoustic map of their environment, relying on distinct echoes to guide their flight paths.
Nanomechanical resonators have been used to sense minuscule forces and mass changes. The new aluminum nitride resonator achieved a quality factor of over 10 million, opening doors to new possibilities in quantum sensing technologies.
Scientists used acoustic mapping technique to track vulnerable capelin species and observe massive predation event involving Atlantic cod. The study revealed that as climate change causes Arctic ice sheet to retreat, capelin will be more stressed and vulnerable to natural predation events.
Researchers successfully generate guided sound waves on a microchip using lasers, enabling interactions with the environment and paving the way for new sensing technologies. The innovative approach uses special glass to contain sound waves, making it ideal for applications in signal processing and communication technologies.
Researchers have developed a handheld, sound-based diagnostic system that can deliver precise blood test results in an hour with minimal finger prick of blood. The system uses functional negative acoustic contrast particles and a custom-built instrument to detect biomarkers in tiny amounts of blood.
Researchers found that people with schizophrenia who experience auditory hallucinations have impaired brain processes, including a 'broken' corollary discharge and 'noisy' efference copy. This impairment may contribute to the loss of ability to distinguish reality from fantasy.
A new hand-held scanner can generate highly detailed 3D images in seconds, paving the way for earlier disease diagnosis. The technology uses laser-generated ultrasound waves to visualize subtle changes in blood vessels, helping inform patient care and diagnose conditions like cancer and cardiovascular disease.
Researchers at Macquarie University developed a new software package, TMATSOLVER, that accurately models complex wave scattering for metamaterial design. The tool enables rapid prototyping and validation of new metamaterial designs, accelerating research and development in this growing global market.
Researchers propose a novel compact meta-silencer design leveraging acoustic black hole and rainbow trapping effects to reduce low-frequency noise. The study demonstrates improved performance with coiled-up slits, achieving an average sound transmission loss of 6.73 dB across a broad frequency band.
Acoustic tweezers use Bessel beams to sort viruses from other particles in human saliva samples. The technology, called BEST, quickly and accurately separates viruses from large and small particles.
A team of researchers at ETH Zurich created a method to suppress sound wave propagation in the backward direction without deteriorating forward propagation. They achieved this using self-oscillations and a circulator, which allows sound waves to travel only one way.
A new deep learning-based inverse design method allows for the optimization of complex acoustic metamaterials, reducing noise pollution while maintaining ventilation. The approach enables ultra-broadband sound attenuation across various peak frequencies.
A novel, fast and high-quality neural text-to-speech model was successfully developed using a Transformer encoder + ConvNeXt decoder and MS-FC-HiFi-GAN. The model can synthesize one second of speech at high speed in just 0.1 seconds using a single CPU core, achieving eight times faster synthesis than conventional methods.
Researchers have spotted the first signs of the Sun's next 11-year solar cycle, which is expected to start in about six years. The detection was made using sound waves inside the Sun and shows a faint indication of Cycle 26, similar to what happened during the previous cycles.
A breakthrough in brain-computer interfaces allows a patient to communicate using only the power of thought. The study, led by Dr. Ariel Tankus, enables individuals with paralysis to signal 'yes' and 'no' through electrical signals in their brain.
Astrophysicists suggest that galaxies control growth through how they 'breathe', using supersonic jets to transmit energy and slow gas-accretion. This helps maintain the galaxy medium, keeping the supermassive black hole engine supplied with fuel.
Using wave momentum shaping, EPFL researchers guided a ping-pong ball along a pre-determined path in a tank of water, even with obstacles and dynamic environments. The method, inspired by optical tweezers, holds great promise for biomedical applications like noninvasive targeted drug delivery.
Researchers found that brain waves bias perception towards more probable sounds or words when stimuli were presented in less 'excitable' brain wave phases. This suggests that both the probability and timing of events influence what people perceive. The study has important implications for theories of predictive coding and language comp...
Scientists at TIBI employed AI to enhance the design and production of nanofibers used in acoustic energy harvesters, resulting in higher power density and energy conversion efficiency. The AI-generated nanofibers produced better performance than conventionally fabricated devices.
Newborns of bilingual mothers exhibit greater sensitivity to a range of sound pitches compared to those from monolingual mothers. The study suggests that prenatal exposure to multiple languages may shape the fetus's auditory system, influencing its ability to process speech sounds at birth.
Researchers found spider webs match acoustic particle velocity for wide range of sound frequencies. Spider silk responds to air particles in a sound field, not just sound pressure, and may inspire new microphone designs.
Researchers at Pohang University of Science & Technology have developed the first wide field-of-hearing metalens, overcoming traditional acoustic lens limitations. The device achieves up to 140 degrees of field-of-hearing without sound distortion, enabling new applications in acoustic imaging and high-sensitivity sensing.
Scientists at the University of Rochester have developed a technique for pairing particles of light and sound, allowing for faithful conversion of information stored in quantum systems. The method uses surface acoustic waves, which can be accessed and controlled without mechanical contact, enabling strong quantum coupling on any material.
A team of researchers from MIT created a lightweight, compact, and efficient mechanism to reduce noise transmission using a sound-suppressing silk fabric. The fabric uses vibrations to cancel out unwanted sounds in two different ways, one for small spaces and another for larger areas like rooms or cars.
A research team has successfully created a new dimension in photonic machine learning by incorporating sound waves, enabling the creation of reconfigurable neuromorphic building blocks. This innovation has the potential to revolutionize computing tasks by providing high-speed and large-capacity solutions.
Researchers from USTC develop a Coupled Shear SAW (CS-SAW) resonator that utilizes two coupling coefficients to achieve high electromechanical coupling coefficient and figure of merit. The CS-SAW resonator was designed on a LiNbO₃-on-SiC substrate and achieved an unprecedented k^2 of 34% at 5 GHz.
Researchers at Duke University have developed a new diagnostic platform that uses sound waves to spin an individual drop of water up to 6,000 revolutions per minute. The technique separates tiny biological particles within samples to enable new diagnostics based on exosomes.
Scientists have developed fUSI technology that enables clinicians to see and map the spinal cord's response to treatments in real-time. This innovation offers improved monitoring of blood flow changes, potentially increasing treatment success rates and optimizing pain relief for patients.