[TOP]ultrasonic ultra·son·ic / ˌʌltrəˈsɔnik; <ɪ style="color:#62081f">ŋæmə <ʃOŋð color="#ˌdˌdˌd">-ˈsɑ:n- / adjective əusually before noun] (of sounds 声音) higher than humans can hear 超声的；超音的: ultrasonic waves 超声波 [TOP]ultrasonic ul·tra·son·ic / ˌʌltrəˈsɑnɪk ; ˌʌltrəˈsɔnɪk / adjective1. ultrasonic sound waves are too high for humans to hear 〔声波〕超声的 [TOP]ultrasonicUK [ˌʌl.trə'sɒn.ɪk] US [-'sɑ:.nɪk] adjective » describes sound which is too high for people to hear （声音）超声的 [TOP]ultrasonic
1.ADJ 形容词 超声波的Ultrasonic sounds have very high frequencies, which human beings cannot hear.