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…
| 单词 | θ76740 |
| 释义 | the world > matter > physics > science of sound > vibration > [adjective] > beyond range (2) 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… hypersonic1937 Of, pertaining to, or designating sound waves or vibrations with a frequency greater than about 1000 million Hz. (Cf. ultrasonic, adj.) |
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