adjective🔗Share超音波の(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. "犬笛は、人間には聞こえないが犬には聞こえる超音波を発します。soundphysicsfrequencytechnologyscienceelectronicsChat with AIVocabulary GamePractice Reading
