Articles tagged with Ultrasonics
Researchers at Pohang University of Science and Technology have developed a speaker system that can deliver sound to a single listener, using dual-domain metamaterials and a compact ultrasonic transducer. The system achieves highly directional audio generation, focusing sound at the front and blocking parasitic noise at the back.
Researchers at MIT developed an ultrasound system that creates a real-time 3D representation of the object being imaged, making it easier to identify and analyze. The AR-VIU technology can be deployed in hospitals for tasks such as placing needles during biopsies, reducing training time and increasing accuracy.
Bats use ultrasonic voices to perceive their surroundings with remarkable precision, actively manipulating sounds to enhance important signals. By controlling echolocation calls, they create a 'silent frequency zone' that improves hunting success in noisy environments.
The Salk Institute will lead an ARPA-H-funded project to develop ultrasound-sensitive protein tools, wearable ultrasound delivery technology, and a translational path to the clinic for major unmet medical needs. The team aims to create a noninvasive therapy for conditions such as peripheral neuropathy.
Researchers developed a novel composite material that combines biochar, carbon nanotubes, and iron carbide, significantly accelerating the breakdown of antibiotics in water. The system achieved up to 15 times higher removal rates compared to conventional materials, while requiring substantially less energy.
Researchers developed a framework to predict acoustic streaming in mid-air phased arrays, revealing its influence on tactile perception and object stability. The study validates thermoviscous and atmospheric attenuation models, enabling precise sound-field design for safer ultrasonic interfaces.
Researchers found that ultrasounds performed too early during hospitalization were more likely to produce false positives, leading to additional invasive testing. Waiting until a fever resolved and closer to discharge did not prolong the hospital stay, but reduced unnecessary tests and added stress for families.
Researchers have developed a natural solid gel pad made from tamarind seed gum, offering improved image quality and patient comfort compared to conventional liquid gel. The new gel pad's self-moisturizing property ensures stable acoustic coupling and enhanced ultrasound image quality.
Researchers developed a high-resolution 3D ultrasonic imaging system for concrete that automatically adapts to different materials, improving contrast between defects and background material. The system uses a wide range of frequencies and can handle diverse materials without manual tuning.
Steatotic liver disease can be precisely assessed using three-dimensional ultrafast vascular ultrasound. The technology visualizes subtle microvascular changes, enabling real-time monitoring of disease progression and therapeutic response.
A new ultrasound technology developed at Johns Hopkins University can distinguish fluid from solid breast masses with near perfect accuracy, improving the diagnostic certainty of radiologists. In initial tests, doctors accurately identified masses 96% of the time, compared to 67% with traditional tools.
MIT engineers have developed an ultrasonic device that vibrates at high frequency to shake out water molecules from a material, recovering clean drinking water in minutes. This design is 45 times more efficient than existing heat-based systems, which can take hours or days.
Researchers developed an ultrasonic microrobot capable of ultrafast bidirectional navigation in confined tubular environments. The robot achieves high speed and low voltage operation, while maintaining stability in various environments and carrying loads beyond its weight.
Researchers developed a non-destructive testing system using bubble wrap bursts, detecting objects within a 2% error margin without electricity or heavy equipment. The system harnesses the acoustic characteristics of bubble wrap bursts to identify internal obstructions in pipes.
A study found that ultrasound-guided IUD insertion is faster than conventional methods, reducing procedure time by an average of seconds. Despite this, pain levels were not significantly different between the two groups.
A novel ultrasound method, SAVES, shows promise for safer vein access in critically ill patients by visualizing both the artery and vein simultaneously. This technique demonstrated a 100% success rate without serious complications.
Researchers identified a key metric, acoustic emission dose, to adjust ultrasound power and open the blood-brain barrier for delivering drugs in patients with high-grade gliomas. This allows for reliable treatment of brain cancer by bypassing the protective blood-brain barrier.
Researchers at NYU Langone Health have developed a new technique using focused sound waves and holograms to activate brain circuits in living animals. The study shows that ultrasound waves can temporarily activate neurons, which can lead to widespread effects on neural networks.
A new breast scan system combines photoacoustic and ultrasound imaging to produce clear 3D images of common breast cancer subtypes. The system, called OneTouch-PAT, takes less than a minute to complete and excels at detecting suspicious lesions in women with dense breast tissue.
Researchers at University of East Anglia developed 4D flow MRI scan to diagnose aortic stenosis more accurately and reliably than current ultrasound techniques. The technology offers more accurate measurements of blood flow through heart valves, leading to better prediction of when patients need surgery.
Researchers at the University of Leicester have developed a technique using soundwaves to separate valuable catalyst materials and fluorinated polymer membranes from catalyst-coated membranes. This breakthrough addresses critical environmental challenges posed by PFAS, which contaminate drinking water and have serious health implications.
Researchers developed a deep learning framework using cross-organ transfer learning to improve breast cancer detection, leveraging experience from pulmonary nodules. The study applied supervised contrastive learning to distinguish normal tissue features from breast nodules, boosting model performance.
Researchers developed a unique electrochemical ultrasonic force microscopy (EC-UFM) technique to observe sodium-ion battery interfaces during operation. The new method guides passivating layer formation, preserving charge carrier transport and enhancing battery performance.
Researchers evaluated the health of accidentally caught sea turtles using ultrasound imaging to monitor gas levels in their organs. Veterinarians found that ultrasound brightness could be used to differentiate gas levels over time, helping them predict treatment outcomes for bycaught sea turtles.
Scientists have discovered that the bat brainstem processes echolocation and communication calls differently, with a stronger response to less frequent calls due to better neural synchronization. The findings may also be relevant to medical applications in humans, such as understanding diseases like ADHD or schizophrenia.
Researchers at the Beckman Institute for Advanced Science and Technology have developed a new framework for super-resolution ultrasound using deep learning, reducing processing speeds from minutes to seconds. The new technology enables real-time blood flow visualization, overcoming challenges faced by conventional methods.
Researchers at Washington University in St. Louis have found a way to enhance glymphatic transport using focused ultrasound with microbubbles, opening new opportunities for studying brain diseases and function. The non-invasive method shows promise for potentially mitigating neurodegenerative diseases like Alzheimer's and Parkinson's.
A software program designed by Timothy G. Leighton predicts the environmental sounds of other planets and how human voices might change in distant worlds. The program uses acoustics and planetary science communities to learn about properties such as chemical composition, atmospheric temperature changes, and roughness of the ground.
Researchers create patch that uses ultrasound to deliver drugs directly to the site of need, reducing systemic toxicity and improving local drug delivery. The device shows promise for treating a range of skin conditions and could also be adapted for hormone delivery and cancer treatment.
Researchers at Tel Aviv University recorded and analyzed plant sounds emitted under stress, identifying specific identifiable sounds. The study suggests that plants may communicate with other plants and animals through these sounds.
A new study uses drone-mounted technology to deter bats from flying into wind turbines, reducing fatalities by 40% and allowing turbines to operate efficiently. The device transmits ultrasonic signals and lights to warn bats of danger, leading them to fly over the turbine and out of harm's way.
Researchers at the University of Technology Sydney have extended the theory of acoustic levitation to account for asymmetrical particles, which is more applicable to real-world experience. This new understanding enables precise control and sorting of tiny objects using ultrasonic waves.
A novel solution uses ultrasonic technology to detect critical form of lubrication between a railway wheel and the track, reducing maintenance costs and improving safety. The automated vehicle-mounted system will communicate presence and absence of lubrication to Network Rail.
Researchers at Goethe University Frankfurt recorded brain waves of bats to understand how they filter out essential signals from echolocation calls and communication signals. The study shows that rare sounds elicit stronger neuronal responses than frequent ones.
Bats build prediction models of prey movement by analyzing echoes of their own vocalizations. This acoustic information facilitates navigation and foraging in total darkness. By integrating representations of prey echoes, bats can determine distance, size, shape, and density, as well as identify what they are tracking.
Researchers have created a system called PrivacyMic that uses ultrasonic sound frequencies to identify household and office activities, with greater than 95% accuracy. This technology enables smart home systems to recognize services needed without recording audible speech.
Scientists at the University of Nottingham have developed an ultrasonic imaging system that can visualize cell abnormalities in 3D using a fiber-optic probe. The technology produces high-resolution images with nanoscopic resolution, enabling more effective diagnoses for diseases such as gastric cancer and bacterial meningitis.
A study at Tel Aviv University reveals that fireflies produce strong ultrasonic sounds that may serve as a defense mechanism against bats. The sounds are undetectable to the fireflies themselves but can be heard by bats, potentially keeping them away from poisonous fireflies.
New research suggests that existing acoustic monitoring measures are insufficient to reliably predict bat mortality risk at large wind turbines. To improve coverage, scientists recommend installing supplementary ultrasonic detectors and complementary sensor technologies like radar systems or thermal imaging cameras.
Researchers have discovered nine types of tonal ultrasonic seal vocalizations reaching up to 50 kHz in Antarctica's McMurdo Sound. The study suggests that Weddell seals may use these sounds for communication or echolocation.
A team of scientists has developed a novel 2D MFOR-PAM system utilizing a 2D microlens array and an acoustic ergodic relay to detect PA signals in parallel. This system can shorten scanning time by at least 400 times compared to conventional OR-PAM systems, while maintaining a simple and economic setup.
Researchers have designed a system that uses tapered chains of spherical beads to effectively dampen high-frequency noises above human hearing range. The material's potential applications include use in headphones or other barriers to filter out such sounds, which may alleviate symptoms like nausea and headaches.
Researchers discovered that moth thorax scales can absorb and reduce sound energy, evading bats' echolocation. This innovative defense strategy increases moth survival chances.
Researchers have developed a new method to test the rheology of complex liquids, such as gelled desserts, using ultrasonic spinning rheometry. This updated method can capture time-dependent properties and has applications in chemical engineering, civil engineering, and cosmetics.
A multi-site international trial has shown promise in reducing the incidence of thoracotomy conversion for VATS/robotic anatomical lung resection. The use of an ultrasonic vessel-sealing device resulted in fewer bleeding complications and a faster recovery time, with no postoperative bleeding from divided PA branches.
A new surgical technique using ultrasonic energy to seal pulmonary artery branches has been shown to reduce post-operative bleeding, complications, and pain in patients with lung cancer. The study's results have the potential to make this less invasive procedure more widely available, leading to faster recovery times for thousands of C...
The 'Robat' uses echolocation to navigate novel environments by emitting sound and analyzing the returning echoes to generate a map of space. It is equipped with an ultrasonic speaker and two microphones that classify borders and shapes of objects encountered, avoiding obstacles.
A study published in PLOS ONE found that mouse vocalizations are influenced by sex and social context, with males producing more vocalizations after social interaction. Females, on the other hand, produce similar numbers of vocalizations regardless of prior social experience.
Researchers at Tomsk Polytechnic University have developed a multi-agent robotic system for flying a swarm of intelligent drones. The drones can synchronize their movements, reconfigure their flightpath, and land with high accuracy, avoiding obstacles up to 5 meters away.
Wild-derived house mice produce complex ultrasonic vocalizations during social and sexual interactions, exhibiting features similar to bird song. Researchers found that calling rates and frequencies were higher in both males and females when paired with the opposite sex than with the same sex.
Researchers at the University of Illinois have designed a sound that is completely inaudible to humans yet is audible to any microphone. This technique, called 'BackDoor,' has numerous applications, including securing private conversations and protecting confidential meetings from electronic eavesdropping. The signal can also be used t...
Researchers found that extinct early whales had hearing similar to terrestrial animals, contradicting previous assumptions. This discovery suggests a more complex evolutionary history for whales, with hearing specialization emerging later.
Researchers have developed a novel signal-processing tool called Mouse Ultrasonic Profile ExTraction (MUPET) that enables unbiased analysis of mouse vocalizations. The tool provides time/date stamped analysis of ultrasonic vocalizations, allowing for correlation with video recorded behavioral interactions.
Researchers at Duke University found that male mice carrying a genetic mutation known to affect human speech struggle with sequencing phonemes into words. The study used new statistical tools to analyze the structure of ultrasonic mouse songs, revealing a similar impact on sequence complexity as seen in humans.
The team created highly uniform arrays of low surface tension functional water-based droplets for biochemical experiments, overcoming current patterning limitations. This non-contact method has potential applications in drug discovery and clinical diagnostics.
Researchers have identified the formation of tiny bubbles around the head of ultrasonic scalers as crucial to the cleaning process. The study's findings aim to develop new instrument designs that maximize cavitation to improve plaque removal, reducing pain and increasing effectiveness.
Researchers at the University of Belgrade developed a graphene-based microphone with up to 15 dB higher sensitivity compared to commercial nickel-based microphones. The graphene membrane was grown on a nickel foil using chemical vapour deposition and showed potential for ultrasonic performance.
A study found that ultrasonic humidifiers emit aerosols with dissolved contaminants, including minerals and metals, which are 90% respirable. The quality of the water source affects the health consequences of inhaling these contaminants.
Scientists at Walailak University and Hokkaido University report the first full 3D scan of a single biological cell, achieving micron resolution with picosecond ultrasonics. This technique allows for nondestructive imaging of living cells, opening new avenues for studying their physical properties.
Researchers at Wake Forest University found that tiger moths can detect an increase in a bat's cry rate and sound intensity, triggering the moth's defense mechanism. The study shows that the tiger moth's tymbal can jam the bat's sonar up to 93% of the time, allowing it to evade attack.