ultrasonic
uhl truh so nik
- s having frequencies above those of audible sound
- A medical worker gives a B-ultrasonic scan to a child sickened by contaminated milk powder at a hospital in Lanzhou, China, on Sept.
- Its ultrasonic image sensor filter vibrates to remove dust that could appear in pictures.
- An ultrasonic sensor in his chest keeps him from plowing into walls, and wireless technology allows him to communicate with a PC for navigating complex routes.