As wind power generation becomes more important, experts in Australia are examining whether wind 'farm' turbine background noise in the environmental can affect sleep and wellbeing of nearby residents. While five previous studies showed no systemic effects on common sleep markers such as time taken to fall asleep and total sleep time - they did reveal some more subtle effect on sleep such as shifts in sleep stages and less time in deep sleep, Flinders University researchers say in a review study.
MIT physicists have observed sound waves moving through a "perfect" fluid. The results should help scientists study the viscosity in neutron stars, the plasma of the early universe, and other strongly interacting fluids.
"Airborne and spaceborne radar and laser-based, or LIDAR, systems have been able to map Earth's landscapes for decades. Radar signals are even able to penetrate cloud coverage and canopy coverage. However, seawater is much too absorptive for imaging into the water," said study leader Amin Arbabian, an associate professor of electrical engineering in Stanford's School of Engineering. "Our goal is to develop a more robust system which can image even through murky water."
Sound waves have been part of science and medicine for decades, but the technologies have always relied on low frequencies. Now researchers have revealed how high frequency sound waves could revolutionise the field of ultrasound-driven chemistry.
Researchers are studying a tornado's song and other 'doors to danger' in an increasingly chaotic world.
Scientists at The University of Tokyo used electron spectroscopy to probe the coordination structures formed by the silicon atoms in aluminosilicate glass. This work may lead to innovations in the touchscreen and solar panel sectors.
The volume and timbre of music have a significant impact on how people perceive the acoustics in a concert hall, according to two recent studies carried out by the research group of Aalto University Professor Tapio Lokki. Both have been published in the Journal of the Acoustical Society of America, one of the most prestigious journals in its field.
Researchers have developed a technique that uses ultrasound to provide non-invasive assessments of pulmonary fibrosis and pulmonary edema. The technique has been shown to both quantify lung scarring and detect lung fluid in rats. A study on pulmonary edema in humans is under way.
Scientists at The University of Tokyo used computer simulations and a two-state mathematical model to analyze previous data on water and predicted the location of a liquid-liquid critical point in supercooled water. This work may help better understand the unusual properties of water that allow life to exist in its current form on Earth.
Led by the Department of Energy's Oak Ridge National Laboratory and the University of Tennessee, Knoxville, a study of a solar-energy material with a bright future revealed a way to slow phonons, the waves that transport heat. The discovery could improve novel hot-carrier solar cells, which convert sunlight to electricity more efficiently than conventional solar cells by harnessing photogenerated charge carriers before they lose energy to heat.