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, ...

trumpet the sound from the trumpet comes from ... High frequency ultrasound waves can be used to detect objects in deep water and to measure the depth of the sea. Ultrasound is reflected off ...

waves have a frequency ... determined using the speed of sound in the material and the time taken High frequency sound waves can be used to detect objects in deep water and to measure water ...