in·fra·sound 
(ĭnfrə-sound′)
(ĭnfrə-sound′)n.
A wave phenomenon sharing the physical nature of sound but with a range of frequencies below that of human hearing.
| 单词 | infrasound |
| 释义 | in·fra·sound (ĭnfrə-sound′)n. A wave phenomenon sharing the physical nature of sound but with a range of frequencies below that of human hearing. |
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