ultrasonic waves; ultrasound
Refers to sound waves above the human hearing range, or the technology/imaging that uses them. Common in medical, industrial, and scientific contexts.
I had an ultrasound examination at the hospital.
Bats use ultrasonic waves to find prey.
The doctor applied ultrasound to the pregnant woman's belly to check on the baby.
Bats emit ultrasonic waves to perceive objects around them.
At the factory, they inspect the inside of metal parts using ultrasound.
ultrasonography; ultrasound diagnosis
ultrasonic flaw detector; ultrasonic test instrument