= infrasonic, adj. 1.
| 单词 | θ65642 |
| 释义 | the world > physical sensation > hearing and noise > inaudibility > [adjective] > subsonic (3) subsonic1920 = infrasonic, adj. 1. subaudible1922 Physics. = infrasonic, adj. 1. infrasonic1927 Of, pertaining to, or designating sound waves or vibrations having a frequency below the audible range (i.e. less than 15–30 Hz). |
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