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| subsonic noise; low-frequency noises | |||
| infrasonic sounds | |||
| infrasonic; infrasound | |||
| infrasonics | |||
| infrasonic vibration; infrasound Vibrations of the air at frequencies too low to be perceived as sound by the human ear, below about 15 hertz | |||
| infrasonic noise | |||
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| infrasonic | |||
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| infrasonic | |||
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Infraschall : 3 短语, 2 学科 |
| 技术 | 2 |
| 物理 | 1 |