What is another word for ultra-sonic?
Pronunciation: [ˈʌltɹəsˈɒnɪk] (IPA) 
Ultra-sonic is a term commonly used to describe the use of sound waves that are too high in frequency to be heard by humans. Synonyms for this term include ultrasonic, sonic, high-frequency, and supersonic. Ultrasonic and high-frequency both refer specifically to sound waves that are beyond the range of human hearing, while supersonic refers to anything that moves faster than the speed of sound. Sonic can be used more broadly to refer to any sound wave, regardless of frequency. Other synonyms for ultra-sonic include infrasonic, which refers to sound waves at a frequency too low for humans to hear, and hypersonic, which refers to anything moving at a speed faster than five times the speed of sound.
