Definitions for infrasound

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Wiktionary

  1. infrasound(Noun)

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

Freebase

  1. Infrasound

    Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high. The ear is the primary organ for sensing infrasound, but at higher intensities it is possible to feel infrasound vibrations in various parts of the body. The study of such sound waves is referred to sometimes as infrasonics, covering sounds beneath 20 Hz down to 0.001 Hz. This frequency range is utilized for monitoring earthquakes, charting rock and petroleum formations below the earth, and also in ballistocardiography and seismocardiography to study the mechanics of the heart. Infrasound is characterized by an ability to cover long distances and get around obstacles with little dissipation.

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"infrasound." Definitions.net. STANDS4 LLC, 2014. Web. 1 Sep. 2014. <http://www.definitions.net/definition/infrasound>.

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