adjective🔗Share초음파의(acoustics) Beyond (higher in frequency than) the range of sound perceptible to the human ear; with a frequency of 20 kilohertz or higher."The dog whistle emits an ultrasonic sound that humans can't hear, but dogs can. "개 휘슬은 인간은 들을 수 없지만 개는 들을 수 있는 초음파를 방출한다.soundphysicsfrequencytechnologyscienceelectronicsChat with AIVocabulary GamePractice Reading
