Music has the ability to captivate us; when listeners engage with music, they follow its sounds closely, connecting to what they hear in an affective and invested way. But what is it about music that keeps the audience engaged? A study by researchers from The City College of New York and the University of Arkansas charts new ground in understanding the neural responses to music.
Researchers at Duke University have constructed a 'meta-mirror' device capable of perfectly reflecting sound waves in any direction. The proof-of-principle demonstration is analogous to looking directly into a mirror and only seeing the person next to you instead of your own face.
Boston University researchers, Xin Zhang, a professor at the College of Engineering, and Ghaffarivardavagh, a Ph.D. student in the Department of Mechanical Engineering, released a paper in Physical Review demonstrating it's possible to silence noise using an open, ringlike structure, created to mathematically perfect specifications, for cutting out sounds while maintaining airflow.
Scientists from the University of Chicago and the University of Bath used sound waves to levitate particles, revealing new insights about how materials cluster together in the absence of gravity -- principles which underlie everything from how molecules assemble to the very early stages of planet formation from space dust.
Research in which the Universidad Carlos III de Madrid (UC3M) is taking part analyses the future of topological insulators using sound waves, meaning materials that behave like acoustic insulators in their interior, but at the same time allow the movement of sound waves at their surface. This line of research could improve acoustic non-destructive testing and medical diagnostics based on ultrasound scans.
Scientists at the University of Bath have levitated particles using sound in an experiment which could have applications in so-called 'soft robotics.'
Combining principles from computational fluid dynamics and acoustics, researchers at the TU Berlin have developed an analytical model that could simplify the process of designing Helmholtz resonators, a type of noise cancelling structure used in airplanes, ships, and ventilation systems. The model can predict a potential Helmholtz cavity's sound spectrum as turbulent air flows over it, and could potentially be used to tune Helmholtz resonators to cancel or avoid any frequency of interest.
Scientists from UC Irvine and UC Riverside showed they could reconstruct what a researcher was doing by recording the sounds of the lab instrument used. The method accurately detects what type of DNA a DNA synthesizer is making. That means academic, industrial, and government labs are potentially wide open to espionage that could destabilize research, jeopardize product development, and even put national security at risk.
Researchers at Aalto University have developed new metasurfaces for the arbitrary manipulation of reflected waves, essentially breaking classical reflection law to engineer it at will.
Quasiparticles that behave like massless fermions, known as Weyl fermions, have been in recent years at the center of a string of exciting findings in condensed matter physics. The group of physicist Sebastian Huber at ETH Zurich now reports experiments in which they got a handle on one of the defining properties of Weyl fermions -- their chirality.