Only when they reach their destination are the sound waves picked up by human ears. "We essentially created a virtual headset," said lead author Jiaxin Zhong, an acoustics researcher at Penn State, in ...

Ultrasound refers to sound waves with frequencies above the human hearing range, or above 20 kHz. These waves travel through the air like normal sound waves but are inaudible to people. Because ...

We can’t hear all levels of sounds. Sound waves with very high frequencies are called ultrasound and our ears can’t detect them. Ultrasound waves have multiple uses including: detecting ...

“Metasurfaces are engineered materials that manipulate wave behaviour in ways that natural materials cannot,” said Zhong. “In ...

At its most fundamental level, sound is mechanical energy traveling through matter in waves. When these waves encounter the human body, they don’t merely pass through; they interact with tissues ...

As an airplane flies faster than the speed of sound, it "pushes" on the sound waves in front of it. But sound waves obey the speed limit—they can't travel faster than the speed of sound.

Underwater waves could also be used to reduce the risks of tsunamis and to improve their early warning systems.

Ultrasound refers to sound waves with frequencies above the range of human hearing, or 20 kHz. These waves travel through the air like normal sound waves but are inaudible to people. Because ...

This class focuses on the role of waves in human body systems through student-directed inquiry using modern medical technologies and explorations of the fundamental science behind sound waves and ...