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.

For example, when two ultrasound beams of slightly different frequencies overlap, such as 40 kHz and 39.5 kHz, a new sound wave is generated at the frequency difference of 0.5 kHz, or 500 Hz ...

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 ...

Ultrasound therapy is emerging as a potential treatment for Alzheimer’s disease. It uses ultrasound to open the blood-brain ...

At the heart of the technology lies ultrasound—sound waves that travel at frequencies beyond the range of human hearing. While typically silent to our ears, ultrasound waves can be manipulated ...

While medical centres use ultrasound daily, so far this technology is not capable of observing body tissues at the scale of cells. Physicists from the University of Technology Delft (The ...

This causes the tissue to expand and contract, creating vibrations which can be picked up as ultrasonic sound waves by sensitive detectors. Different materials and molecules inside the tissue ...

This causes the tissue to expand and contract, creating vibrations, which can be picked up as ultrasonic sound waves by sensitive detectors. Different materials and molecules inside the tissue ...

The Penn State team has been using two beams of ultrasound waves to act as a carrier for audible sound. They're silent to human ears until the point where they're forced to intersect, at which ...

ST. PAUL, Minn., April 8, 2025 /PRNewswire/ -- SecondWave Systems, Inc., a clinical stage medical device company developing a novel ultrasound-based treatment for inflammatory disorders ...

Ultrasonic sounds are high-frequency sound waves that exceed 20,000 hertz, making them too high-pitched for human ears to detect. These sound waves vibrate more than 20,000 times per second. Doctors ...