Of a sound, frequency, etc.: above the upper limit of human hearing; ultrasonic. Now rare.
单词 | θ65502 |
释义 | the world > physical sensation > hearing and noise > thing heard > [adjective] > ultrasonic (4) superaudible1917 Of a sound, frequency, etc.: above the upper limit of human hearing; ultrasonic. Now rare. supersonic1919 Designating sound waves or vibrations with a frequency above the range of human hearing (i.e. greater than 20 kilohertz); relating to or involving… ultrasonic1923 Employing or operated by sound waves or vibrations having a frequency above the range of human hearing (i.e greater than 15–20 kHz); used esp. with… ultrasonic1923 The more usual synonym of supersonic, adj. 1. |
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