What is the meaning of Ultrasonic?
Beyond (higher in frequency than) the range of sound perceptible to the human ear; with a frequency of 20 kilohertz or higher.
Source: wiktionary.orgSearch words containing
Beyond (higher in frequency than) the range of sound perceptible to the human ear; with a frequency of 20 kilohertz or higher.
Source: wiktionary.orgSearch words containing