in·​fra·​son·​ic | \ ˌin-frə-ˈsä-nik How to pronounce infrasonic (audio) , -(ˌ)frä- \

Definition of infrasonic

1 : having or relating to a frequency below the audibility range of the human ear
2 : utilizing or produced by infrasonic waves or vibrations

Examples of infrasonic in a Sentence

Recent Examples on the Web The study offers few clues about how terns might do this, but other research suggests some migrating birds detect infrasonic weather signals or observe changing clouds. Joshua Rapp Learn, Scientific American, "Seabirds Anticipate Typhoons to Help Migrations," 1 Oct. 2020 For instance, hot lava flowing down the mountain essentially drained the lava lake at its summit, so there should be a corresponding shift in the infrasonic signature. Jennifer Ouellette, Ars Technica, "Scientists look to music of volcanos to better monitor eruptions," 24 Aug. 2018 These devices usually operate at the ultrasonic level (above audible range) or the infrasonic level (below audible range). Alex Ward, Vox, "What’s happening to US diplomats in Cuba and China? Here are 4 theories.," 8 June 2018 An infrasonic or ultrasonic weapon can cause hearing loss and physical pain by emitting a sound not audible to a human ear within the vicinity of the victim. Casey Quackenbush, Time, "Canada Recalls Families of Diplomats in Cuba Following Mystery Illness," 17 Apr. 2018 Since the 1990s, the US military and private companies researched infrasonic devices that could cause behavior changes at frequencies too low to be audible. Zachary Cohen, CNN, "New audio adds to mystery of attacks on US diplomats," 13 Oct. 2017 To monitor the volcano’s volatility, seismographs, strainmeters, geomagnetometers, infrasonic microphones and water-tube tiltmeters have been placed on the mountain’s slopes and around its 78-mile perimeter. Gilles Mingasson, Smithsonian, "Why Mount Fuji Endures As a Powerful Force in Japan," 2 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infrasonic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of infrasonic

1927, in the meaning defined at sense 1

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The first known use of infrasonic was in 1927

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Cite this Entry

“Infrasonic.” Dictionary, Merriam-Webster, Accessed 24 Jan. 2021.

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More Definitions for infrasonic


in·​fra·​son·​ic | \ -ˈsän-ik How to pronounce infrasonic (audio) \

Medical Definition of infrasonic

1 : having or relating to a frequency below the audibility range of the human ear
2 : utilizing or produced by infrasonic waves or vibrations

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