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Generating or using waves or vibrations with frequencies below that of audible sound.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌɪn frəˈsɒn ɪk)

noting or pertaining to a sound wave with a frequency below the range of normally audible sound.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.infrasonic - having frequencies below those of audible sound
inaudible, unhearable - impossible to hear; imperceptible by the ear; "an inaudible conversation"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


[ˈɪnfrəˌsɒnɪk] ADJinfrasónico
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
References in periodicals archive ?
The second explosion, detected only by infrasonic air pressure sensors and not by the seismic monitors that pick up movements in the ground, was likely from an airborne rocket powered by radioactive fuel, the Norsar agency said.
Some of this is in the lower audio and even infrasonic frequencies.
Several other presenters also discussed their work with yet other distinctive data types of interest to the US Navy, including infrasonic waves, marine geologic data, atmosphere aerosol data, and side-scan sonar.
Depending on such a method where and when the matter and energies involved are in classical range and the energy transformations are not quantum in nature, the quantum mechanical approach to understand human consciousness has limitations and is unsuitable in the infrasonic, chemical, physical, electrochemical energy reversible transformations which constitute the working of human consciousness and mind (Ramabrahmam, 2007, 2013, 2016).
Professor Fei studied the energy change and damage mechanism of uniaxial compression of cemented tailings backfill based on the characteristics of infrasonic signals [1].
Edmonds, "The simultaneous measurement of infrasonic acoustic particle velocity and acoustic pressure in the ocean by freely drifting swallow floats," IEEE Journal of Oceanic Engineering, vol.
The Volcanic Surveillance Center reported that seismic and infrasonic data suggests that ash disposal continued after the initial eruption.
(1967) Infrasonic waves from the marine storm of April 7, 1966.
From the infrasonic frequencies (below human hearing) of baleen whales to the ultrasonic frequencies (above human hearing) used by toothed whales, the vocal and hearing range of whales is impressive, but it wasn't always so.
I spent hours scrolling through my Kaleidescape movie collection, picking scenes and sampling a few minutes here and there, each time marveling at the infrasonic information that the SB16-Ultra was able to squeeze from a scene, turning each viewing into something new, and making everything you watched that much more exciting.