A bioengineer highlights the potential of low-intensity ultrasound for multiple uses, from enhanced drug delivery to the ...

By combining ultrasound with a concept called nonlinear acoustics, you can create sound that stays silent until it reaches a ...

Directing sound to a specific location is difficult because of how sound waves behave. As vibrations move through the air, ...

In a world where sound surrounds us—often uninvited and unavoidable—a team of researchers at Penn State University has ...

For the diagnosis of disorders and the monitoring of patients, healthcare providers need to be able to look not only at a ...

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 ...

Crucially, the sound waves — specifically, ultrasound waves — used to create the audible enclaves can't be heard along the path they travel and can even be bent to avoid obstacles. Only when they ...