A new "tractor beam" can levitate large objects in midair, using only sound. So far, researchers have floated spheres as large as 0.6 inches (16 millimeters) in diameter and moved orbs as large as 0.8 ...

In the new device, an array of 256 speakers, each about 1 centimeter wide, faces another, identical speaker array across a distance of 23 centimeters. The speakers emit sound waves at frequencies too ...

Researchers at the University of Bristol have been able to levitate objects using ultrasonic waves larger than the wavelengths of sound used by the device. This could enable touchless control of drug ...

Scientists at the Public University of Navarra and the University of Bristol have developed an intriguing "sound tweezer" device that coordinates the tiny mechanical forces exerted by five hundred ...

The ultimate goal to making virtual reality feel more like reality is letting users physically touch non-existent objects in a VR world. Until we figure out the technology behind Star Trek’s Holodecks ...

Amanda D. Hanford, at Pennsylvania State University, is taking the introductory steps to make acoustic ground cloaks. These materials redirect approaching waves around an object without scattering the ...