| 41. | The organization also will keep watch for any nuclear tests through ground vibrations, air sampling and infrasound tests.
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| 42. | Fiber optic microphones are used in very specific application areas such as for infrasound monitoring and noise-canceling.
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| 43. | :* Human singers : some vocalists, including Tim Storms, can produce notes in the infrasound range.
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| 44. | The only bird known to make use of infrasound ( at about 20 Hz ) is the western capercaillie.
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| 45. | Drummond, Flicky, Peregrine and No . 7 escape the subsequent mayhem, having retrieved the infrasound device.
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| 46. | Playback experiments using prerecorded elephant vocalizations show that elephants can perceive infrasound and how they respond to these stimuli.
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| 47. | Infrasound perception has been observed and quantified in the homing pigeon which has particularly good long distance navigation skills.
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| 48. | Research by Jon Hagstrum of the US Geological Survey suggests that homing pigeons use low-frequency infrasound to navigate.
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| 49. | Snakes sense infrasound through their jaws, and baleen whales, giraffes, dolphins and elephants use it for communication.
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| 50. | The CTBTO also recorded the infrasound produced in the atmosphere by the meteor explosion over Chelyabinsk, Russia in 2013.
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