In a new study, researchers showed that using sound waves to levitate droplets of water in midair can improve the detection of harmful heavy metal contaminants such as lead and mercury in water. Detecting small amounts of ...
Optics & Photonics
May 3, 2018
0
53
An 'acoustic fog' from motorboat noise, underwater construction and other man-made marine sounds can threaten the survival of fish and their ability to communicate with each other, research has found.
Ecology
Apr 10, 2018
0
22
Scientists have demonstrated for the first time how 'twisted' sound waves from a rotating source can produce negative frequencies—akin to turning back time.
Optics & Photonics
Mar 27, 2018
0
63
Acoustic tractor beams use the power of sound to hold particles in mid-air, and unlike magnetic levitation, they can grab most solids or liquids. For the first time University of Bristol engineers have shown it is possible ...
General Physics
Jan 22, 2018
16
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In today's "internet of things," devices connect primarily over short ranges at high speeds, an environment in which surface acoustic wave (SAW) devices have shown promise for years, resulting in the shrinking size of your ...
General Physics
Dec 20, 2017
0
81
Wind turbines have a design life of 20 years. The rotor blades must be regularly inspected at least once every four years to verify their structural integrity. This type of work is performed by industrial climbers. But the ...
Engineering
Dec 1, 2017
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10
Researchers at IMDEA Networks (Spain) in collaboration with University of Haifa (Israel) have developed an underwater acoustic system for the localization of marine mammals, underwater vehicles and other sound sources in ...
Engineering
Nov 22, 2017
0
47
Tales of the acoustics at the 2300 year-old Greek theater of Epidaurus tend to be told in terms of superlatives. Not actually justified, according to measurements taken by researchers from Eindhoven University of Technology. ...
Engineering
Oct 20, 2017
0
21
(Phys.org)—Researchers have demonstrated that the geometry of a natural spider web can be used to design new structures that address one of the biggest challenges in sound control: reducing low-frequency noise, which is ...
The global marine industry represents a multi-billion-dollar per year business. Its main activities are related to natural resources that are abundant in the sea (especially oil and gas), to communication and trading gateways ...
Ecology
Sep 7, 2017
0
2
