Dogs weren’t always waiting by the door for snack time. Long ago, their hearing played a crucial role in survival. Dogs are ...

NowThis. Ultrasonic Sound Waves Create 3D Images and Stimulate Sense of Touch Like 'Star Wars' Holograms. Posted: August 29, 2024 | Last updated: April 26, 2025 ...

Ultrasonic sound is punishment. The higher the frequency, the more harm. The longer you hold your finger on the control ...

Using a series of acoustic lenses, or metasurfaces, this system bends ultrasonic beams through the air. When two beams cross, they generate sound only in a small, targeted space. If you’re ...

“The ultrasonic buoys send out ultrasonic sound — a high frequency — across the surface of the water,” Tampa Water Production Manager John Ring said.

“The sound waves create microscopic bubbles in a diazonium salt solution, which then collapse rapidly creating tiny bursts of heat and pressure,” Associate Professor Darwish said. “This triggers a ...