New audio tech uses ultrasound to create isolated pockets of sound, enabling private listening without headphones.

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

In physics, 'ultrasound' refers to sound waves with a frequency too high for humans to hear. The sound reflects and echoes off parts of the tissue; this echo is recorded and displayed as an image ...

Ultrasound technology uses sound waves produced and detected by a tool called a transducer. An echo is produced when body tissues reflect the sound waves emitted by the transducer. The transducer ...

Heart conditions can be difficult to diagnose, often requiring specialised tools to provide a clear picture of a patient’s heart health. Among the most effective methods is the echo test for heart, ...

As the technology advances, it gets cheaper, more portable, and more powerful. Since it uses sound waves, an ultrasound doesn’t put the patient at risk for radiation. Despite its usefulness, ...

And the results are over 95% accurate." An echo test involves ultrasound-- high-frequency sound waves -- to evaluate the function of heart muscle and valves, the same technology used to ensure a ...

Among them is ultrasound-based water purification, a promising approach that uses high-frequency sound waves to eliminate contaminants without chemicals. Ultrasound purification relies on a ...