What does empty space sound like? We need your help to find out

We know that there is sound on planets and moons in the solar system – places where there's a medium through which sound waves can be transmitted, such as an atmosphere or an ocean. But what about empty space? You may have ...

Study reveals previously unknown component of whale songs

Researchers have known for decades that whales create elaborate songs, sometimes projecting their calls for miles underwater. A new study from the Woods Hole Oceanographic Institution (WHOI), however, has revealed a previously ...

Lego-like wall produces acoustic holograms

Research Triangle engineers have developed a simple, energy-efficient way to create three-dimensional acoustic holograms. The technique could revolutionize applications ranging from home stereo systems to medical ultrasound ...

Basic structure of ultrasound power supply and communication

Unlike drugs, active implants such as electroceuticals act locally, have fewer side effects and function directly through electrical signals, much like the body itself. At the Medica 2016 trade fair in Düsseldorf, Fraunhofer ...

Metamaterial separation proposed for chemical, biomolecular uses

The unique properties of metamaterials have been used to cloak objects from light, and to hide them from vibration, pressure waves and heat. Now, a Georgia Institute of Technology researcher wants to add another use for metamaterials: ...

New theory of deep-ocean sound waves may aid tsunami detection

Acoustic-gravity waves are very long sound waves that cut through the deep ocean at the speed of sound. These lightning-quick currents can sweep up water, nutrients, salts, and any other particles in their wake, at any water ...

page 3 from 7