Ultrasonic
/ˌʌltrəˈsɑnɪk/
Listen pronunciation
Definition
(adj) Beyond (higher in frequency than) the range of sound perceptible to the human ear; with a frequency of 20 kilohertz or higher.
Sentence Examples
The device uses ultrasonic waves to clean the small parts.
Ultrasonic means relating to or using very high sound waves.
CEFR Practice Quiz
Some animals can hear ____ sounds that are far too high in frequency for humans to detect with their own ears today.