Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A wave phenomenon sharing the physical nature of sound but with a range of frequencies below that of human hearing.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun physics Sound waves having frequency below the human audible range (below about 20 Hz).

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

infra- +‎ sound

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Examples

  • And I recall from my army papers, that internal organs have their resonating frequencies, but they are generally in infrasound range.

    Death Rays from Silent Sounds 2008

  • The AGNIR report also looks at the available evidence for the health effects of infrasound, which is produced by aircraft, trains and other machines, as well as thunderstorms, wind and waves.

    Medlogs - Recent stories 2010

  • More importantly, and speaking of porn, is there a kind of infrasound that can generate sudden and uncontrollable sexual arousal?

    Infrasound Ghosts « Skid Roche 2003

  • The National Health and Medical Research Council assessed the common complaints levelled at the wind-powered energy sector, chiefly that its turbines also generate "infrasound" that can make wind farm neighbours feel ill.

    Medindia Health News 2010

  • The sound of an aboveground blast dies quickly in the atmosphere, but its "infrasound" can circle the globe, to be picked up in Australia, the Azores or any of 58 other locations.

    Latest Headlines - ABC 7 News 2009

  • The sound of an aboveground blast dies quickly in the atmosphere, but its "infrasound" can circle the globe, to be picked up in Australia, the Azores or any of 58 other locations.

    Statesman - AP Sports 2009

  • "infrasound" that can make wind farm neighbours feel ill.

    AustralianIT.com.au | Top Stories 2010

  • "infrasound" that can make wind farm neighbours feel ill.

    The Sydney Morning Herald News Headlines 2010

  • Almost certainly these big dinosaurs had to be making infrasound.

    Birdology Sy Montgomery 2010

  • And infrasound was probably also a perfect way for other very large individuals, living far apart from one another, in similar habitat: the dinosaurs.

    Birdology Sy Montgomery 2010

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