Showing 20 articles starting at article 961
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Categories: Chemistry: General, Physics: Acoustics and Ultrasound
Published Creating 3D objects with sound
(via sciencedaily.com) Scientists have created a new technology to assemble matter in 3D. Their concept uses multiple acoustic holograms to generate pressure fields with which solid particles, gel beads and even biological cells can be printed. These results pave the way for novel 3D cell culture techniques with applications in biomedical engineering.
Published Focused ultrasound technique leads to release of neurodegenerative disorders biomarkers
(via sciencedaily.com) New research found that using focused-ultrasound-mediated liquid biopsy in a mouse model released more tau proteins and another biomarker into the blood than without the intervention. This noninvasive method could facilitate diagnosis of neurodegenerative disorders, the researchers said.
Published Wearable sensor uses ultrasound to provide cardiac imaging on the go
(via sciencedaily.com) Engineers and physicians have developed a wearable ultrasound device that can assess both the structure and function of the human heart. The portable device, which is roughly the size of a postage stamp, can be worn for up to 24 hours and works even during strenuous exercise.
Published A precision arm for miniature robots
(via sciencedaily.com) Until now, microscopic robotic systems have had to make do without arms. Now researchers have developed an ultrasonically actuated glass needle that can be attached to a robotic arm. This lets them pump and mix minuscule amounts of liquid and trap particles.
Published Tracking radiation treatment in real time promises safer, more effective cancer therapy
(via sciencedaily.com) Radiation, used to treat half of all cancer patients, can be measured during treatment for the first time with precise 3D imaging. By capturing and amplifying tiny sound waves created when X-rays heat tissues in the body, medical professionals can map the radiation dose within the body, giving them new data to guide treatments in real time. It's a first-of-its-kind view of an interaction doctors have previously been unable to 'see.'
Published Team writes letters with ultrasonic beam, develops deep learning based real-time ultrasonic hologram generation technology
(via sciencedaily.com) A team has developed a 'deep learning-based ultrasound hologram generation framework' technology that can freely configure the form of focused ultrasound in real time based on holograms. It is expected to be used as a basic technology in the field of brain stimulation and treatment that requires precision in the future.
Published A type of simple, DIY air filter can be an effective way to filter out indoor air pollutants
(via sciencedaily.com) A study found that inexpensive, easy-to-assemble Corsi-Rosenthal boxes can help reduce exposure to indoor air pollutants. The air filters have already been shown to reduce particles carrying the SARS-CoV-2 virus.
Published Brain flexibility may hasten hearing improvements from cochlear implants
(via sciencedaily.com) Kickstarting the brain's natural ability to adjust to new circumstances, or neuroplasticity, improves how effectively a cochlear implant can restore hearing loss, a new study in deaf rats shows. The investigation, researchers say, may help explain the extreme variation in hearing improvements experienced by implant recipients.
Published An exotic interplay of electrons
(via sciencedaily.com) Water that simply will not freeze, no matter how cold it gets -- a research group has discovered a quantum state that could be described in this way. Experts have managed to cool a special material to near absolute zero temperature. They found that a central property of atoms -- their alignment -- did not 'freeze', as usual, but remained in a 'liquid' state. The new quantum material could serve as a model system to develop novel, highly sensitive quantum sensors.
Published Wireless earphones as inexpensive hearing aids
(via sciencedaily.com) Some commercial earbuds can perform as well as hearing aids. The result could help a large proportion of people with hearing loss access more affordable sound amplification devices.
Published Want to fire up the dance floor? Play low-frequency bass
(via sciencedaily.com) To find out how different aspects of music influence the body, researchers turned a live electronic music concert into a lab study. By introducing levels of bass over speakers that were too low to hear and monitoring the crowd's movements, scientists found that people danced 11.8 percent more when the very low frequency bass was present.
Published Automatic speaker recognition technology outperforms human listeners in the courtroom
(via sciencedaily.com) The forensic-voice-comparison system, based on state-of-the-art automatic-speaker-recognition technology, outperformed all the listeners.
Published Using sound to model the world
(via sciencedaily.com) Researchers have developed a machine-learning technique that captures and models the underlying acoustics of a scene from a limited number of sound recordings. The system can accurately simulate what any sound, like a song, would sound like if a person were to walk around to different locations in a scene.
Published Capturing and analyzing subtle combination tones produced by violins
(via sciencedaily.com) When two musical notes are played simultaneously, the human ear can perceive weak additional tones called combination tones. While less perceivable, objective combination tones are also generated by some musical instruments. Researchers have now used violins to explore these rarely studied objective combination tones. They found that the combination tones produced by higher-quality violins were much stronger and clearly audible and powerful air resonance and violin sound quality are linked. The higher-quality violins produced a stronger air resonance due to several factors, including structural material and crafting techniques.
Published How low-cost earbuds can make newborn hearing screening accessible
(via sciencedaily.com) Researchers have created a newborn hearing screening system that uses cheap earbuds and a smartphone instead of an expensive commercial device.
Published Skin-attachable auditory sensor that functions even in noisy environments
(via sciencedaily.com) A research team has developed a skin-attachable auditory sensor, which recognizes human voices in noisy environments and when users wear facemasks. The new sensor will be useful in microphones that facilitate communication in disaster situations and for healthcare devices that diagnose respiratory diseases.
Published Would traffic noise from future flying cars cause stress?
(via sciencedaily.com) Study shows that not only are loud vehicles flying overhead a cause of noise pollution-related stress, the effect of that stress remains on the body even after noise levels have decreased.
Published The Secret of Swing: Downbeat delays
(via sciencedaily.com) Jazz must swing -- jazz musicians agree on that. However, even 100 years after the beginnings of jazz, it is still unclear what exactly constitutes the swing feel. With a sophisticated experiment and data analyses on more than 450 well-known jazz solos, physicists together with psychologists have unraveled a secret of swing. They were able to demonstrate that certain systematic deviations in timing are a key component of swing. These microtiming deviations are so small that they are not perceived as such even by professional jazz musicians, who nonetheless are using them unconsciously.
Published Wind music causes less transmission than singing, study finds
(via sciencedaily.com) The risk of transmission from an infected person on a wind instrument is generally much lower than for people who sing or speak, provided that one spends the same amount of time in their vicinity, according to a new study.
Published The super-fast MRI scan that could revolutionize heart failure diagnosis
(via sciencedaily.com) Researchers have developed cutting-edge technology to diagnose patients with heart failure in record time. The state-of-the-art technology uses magnetic resonance imaging (MRI) to create detailed 4D flow images of the heart. But unlike a standard MRI scan, which can take up to 20 minutes or more, the new 4D heart MRI scan takes just eight minutes.