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Categories: Physics: Acoustics and Ultrasound
Published Concert hall acoustics for non-invasive ultrasound brain treatments
(via sciencedaily.com) Engineers have developed a device that is a first step to enabling noninvasive, ultrasound-based therapies for the brain. For example, ultrasound waves are currently being used in clinical trials to treat epilepsy.
Published Quantum dots shine bright to help scientists see inflammatory cells in fat
(via sciencedaily.com) To accurately diagnose and treat diseases, doctors and researchers need to see inside bodies. Medical imaging tools have come a long way since the humble x-ray, but most existing tools remain too coarse to quantify numbers or specific types of cells inside deep tissues of the body. Quantum dots can do that, according to new research in mice.
Published New acoustic fabric converts audible sounds into electrical signals
(via sciencedaily.com) Researchers have developed a new acoustic fabric converts audible sounds into electrical signals. They designed a fabric that works like a microphone, converting sound first into mechanical vibrations, then into electrical signals, similarly to how our ears hear.
Published Gravitational wave mirror experiments can evolve into quantum entities
(via sciencedaily.com) Scientists review research on gravitational wave detectors as a historical example of quantum technologies and examine the fundamental research on the connection between quantum physics and gravity. The team examined recent gravitational wave experiments, showing it is possible to shield large objects from strong influences from the thermal and seismic environment to allow them to evolve as one quantum object. This decoupling from the environment enables measurement sensitivities that would otherwise be impossible.
Published Acoustic propulsion of nanomachines depends on their orientation
(via sciencedaily.com) Scientists have now found answers to central questions which had previously stood in the way of acoustic propulsion of nanoparticles.
Published Physicists show how frequencies can easily be multiplied without special circuitry
(via sciencedaily.com) A new discovery by physicists could make certain components in computers and smartphones obsolete. The team has succeeded in directly converting frequencies to higher ranges in a common magnetic material without the need for additional components. Frequency multiplication is a fundamental process in modern electronics.
Published Ultrasound scan can diagnose prostate cancer
(via sciencedaily.com) An ultrasound scan can be used to detect cases of prostate cancer, according to new research.
Published Ultrasounds for endangered abalone mollusks
(via sciencedaily.com) The world's abalone are threatened, endangered or otherwise vulnerable in nearly every corner of the planet. If only we could wave a magic wand to know when abalone are ready to reproduce, without even touching them. Scientists have now found that wand -- although it isn't magic, and it only looks like a wand. It's an ultrasound transducer, and it can be used to quickly and noninvasively detect when abalone are ready to spawn, they report in a study this week.
Published Transparent ultrasound chip improves cell stimulation and imaging
(via sciencedaily.com) Ultrasound scans -- best known for monitoring pregnancies or imaging organs -- can also be used to stimulate cells and direct cell function. A team of researchers has developed an easier, more effective way to harness the technology for biomedical applications.
Published Low-cost, 3D printed device may broaden focused ultrasound use
(via sciencedaily.com) Medical researchers have developed a method for producing a low-cost, easy-to-use focused ultrasound device that can help open up the blood-brain barrier for non-invasive procedures and diagnostics.
Published Musicians, chemists use sound to better understand science
(via sciencedaily.com) A team of researchers from music, chemistry and computer science is using sound to better understand biochemical processes such as the physical mechanisms of protein folding.
Published Speed of sound used to measure elasticity of materials
(via sciencedaily.com) Researchers have devised a revolutionary new technique for measuring the microscopic elasticity of materials. Known as SRAS, the technology works by measuring the speed of sound across the material's surface.
Published Balancing sustainability, safety and comfort in engineered floor slabs
(via sciencedaily.com) Using less material in floors is a viable strategy for improving sustainability in buildings, as it can reduce the structure's environmental footprint. Prioritizing only this goal, however, can lead to unwanted effects -- such as an echo in a room or noise traveling between floors, according to architectural engineers.
Published A new amplifying technique for weak and noisy signals
(via sciencedaily.com) Scientists have demonstrated a technique for the recovery of weak, noise-dominated optical signals.
Published Ultrasound technique predicts hip dysplasia in infants
(via sciencedaily.com) A technique that uses ultrasound images to determine the depth and shape of the hip socket can accurately predict which infants with hip dysplasia will develop normal hip structure and which remain dysplastic, according to a new study. Researchers said statistical shape modeling improves on existing techniques and could spare many infants from unnecessary treatment.
Published When graphene speaks, scientists can now listen
(via sciencedaily.com) Brothers working in a lab discover that sound can be used to analyze the properties of laser-induced graphene in real time.
Published Owl wing design reduces aircraft, wind turbine noise pollution
(via sciencedaily.com) Researchers used the characteristics of owl wings to inform airfoil design and significantly reduce trailing-edge noise. The team used noise calculation and analysis software to conduct a series of detailed theoretical studies of simplified airfoils with characteristics reminiscent of owl wings. They applied their findings to suppress the noise of rotating machinery. Improving the flow conditions around the trailing edge and optimizing the shape of the edge suppressed the noise.
Published The first topological acoustic transistor
(via sciencedaily.com) Researchers have designed and simulated the first topological acoustic transistors -- with sound waves instead of electrons -- and proposed a connection architecture to form a universal logic gate that can switch the flow of sound on and off.
Published New research sheds light on how ultrasound could be used to treat psychiatric disorders
(via sciencedaily.com) A new study has shown how the brain gives credit to events, along with how transcranial ultrasound (TUS) can disrupt this process. While currently developed in an animal model, this line of research and the use of TUS could one day be applied to clinical research to tackle conditions such as addiction.
Published Gunfire or plastic bag popping? Trained computer can tell the difference
(via sciencedaily.com) Engineering researchers have developed a gunshot detection algorithm and classification model that can discern similar sounds such as gunfire or a plastic bag popping. Discerning between a dangerous audio event like a gun firing and a non-life-threatening event, such as a plastic bag bursting, can mean the difference between life and death. Additionally, it also can determine whether or not to deploy public safety workers. Humans, as well as computers, often confuse the sounds of a plastic bag popping and real gunshot sounds.