When [Electron Impressions] used a powerful ultrasonic array to project a narrow beam of sound toward a target, he described ...

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 ...

Sound waves are used in many imaging applications, but they're often underpowered and hard to focus. But focus them into "sound bullets" and all sorts of interesting things happen. A paper published ...

Levitation is often thought of as the realm of magicians or The Jetsons, but it is technically possible. That said, the tech seems to be moving pretty slowly. Now, researchers at the University of ...

June 26 (UPI) --Scientists have developed a superior sound-reflecting material. The "retroreflector" technology can bounce back sound waves in the direction they came from. Previous retroreflectors ...

That additional information could boost performance of passive sonar and echolocation systems for detecting and tracking adversaries in the ocean, medical imaging devices, seismic surveying systems ...