Ultrasound is sound with a frequency greater than the upper limit of human hearing (greater than 22.1 kHz).
Ultrasonic is an adjective referring to ultrasound.
Ultrasound and ultrasonic may also refer to:
Medical ultrasonography, an ultrasound-based diagnostic imaging technique
Ultrasound (band), a rock band
Gravis Ultrasound, a sound card for the PC
Ultra-Sonic (band), a Scottish dance group
Ultrasonic (film), an American independent film
Ultrasonic sensors and transducers which use ultrasound to measure distance and velocity
Ultrasonic testing, a technique of non-destructive testing
Ultrasonic cleaning
Ultrasonic welding
Ultrasonic motors, a type of motor that utilizes ultrasonic vibrations
