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Snow Avalanche Detection and Source Constraints Made Using a Networked Array of Infrasound Sensors
Journal of Geophysical Research: Earth Surface, 2021We studied a triggered snow avalanche (∼60 s in duration and with ∼1,100 m run‐out) using a network of infrasound arrays and time‐synced video, with the objective of understanding the relationship between infrasound generation and flow dynamics.
Jeffrey B. Johnson +4 more
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A portable infrasound generator
The Journal of the Acoustical Society of America, 2009The rotary subwoofer is a novel low frequency transducer capable of efficiently generating infrasound from a compact source. A field-deployable version of this device may find application as a calibration source for infrasound arrays of the International Monitoring System (IMS) [(2001).
James Bruce Robertson, Joseph Park
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Coherency of infrasound studied with a large aperture infrasound array in the Netherlands
The Journal of the Acoustical Society of America, 2008A large aperture infrasound array (LAIA) is being constructed in the Netherlands as geophysical part of an astronomical low frequency array, i.e., the LOFAR project. This array extends the detection capabilities of infrasound up to the mHz range, including acoustic-gravity and gravity waves as well.
Laeslo G. Evers, J.H. Mentink
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The Journal of the Acoustical Society of America, 1978
A trial was made to investigate cardiopulmonary response to infrasound (IFS) in man and dogs whose whole body were exposed to high level (110 dB SPL) of infrasound (8–50 Hz), produced by a powerful speaker system. Experiments on man revealed that heart rate and respiratory frequency decreased by the mean values of 10% and 20% respectively but no ...
O. Okai +6 more
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A trial was made to investigate cardiopulmonary response to infrasound (IFS) in man and dogs whose whole body were exposed to high level (110 dB SPL) of infrasound (8–50 Hz), produced by a powerful speaker system. Experiments on man revealed that heart rate and respiratory frequency decreased by the mean values of 10% and 20% respectively but no ...
O. Okai +6 more
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1998
Ultrasound and infrasound differ from “ordinary” sounds in three distinct ways that influence all the considerations of this chapter. The first and most obvious characteristic of these sound types is that, by definition, they are “extreme” frequencies that fall outside the normal response curve for the human ear (see Figure 1) and are therefore ...
J. D. Pye, W. R. Langbauer
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Ultrasound and infrasound differ from “ordinary” sounds in three distinct ways that influence all the considerations of this chapter. The first and most obvious characteristic of these sound types is that, by definition, they are “extreme” frequencies that fall outside the normal response curve for the human ear (see Figure 1) and are therefore ...
J. D. Pye, W. R. Langbauer
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Journal of Volcanology and Geothermal Research, 2011
Abstract Exploding volcanoes, which produce intense infrasound, are reminiscent of the veritable explosion of volcano infrasound papers published during the last decade. Volcano infrasound is effective for tracking and quantifying eruptive phenomena because it corresponds to activity occurring near and around the volcanic vent, as opposed to seismic ...
J. B. Johnson, RIPEPE, MAURIZIO
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Abstract Exploding volcanoes, which produce intense infrasound, are reminiscent of the veritable explosion of volcano infrasound papers published during the last decade. Volcano infrasound is effective for tracking and quantifying eruptive phenomena because it corresponds to activity occurring near and around the volcanic vent, as opposed to seismic ...
J. B. Johnson, RIPEPE, MAURIZIO
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, 2021
Microbarometers deployed to measure atmospheric infrasound are often connected to, or housed within, a wind noise reduction system (WNRS). At infrasound arrays of the International Monitoring System (IMS), being deployed as part of Comprehensive ...
D. N. Green +3 more
semanticscholar +1 more source
Microbarometers deployed to measure atmospheric infrasound are often connected to, or housed within, a wind noise reduction system (WNRS). At infrasound arrays of the International Monitoring System (IMS), being deployed as part of Comprehensive ...
D. N. Green +3 more
semanticscholar +1 more source
Journal of Atmospheric and Terrestrial Physics, 1971
Abstract We consider atmospheric pressure variations in the period range from a few seconds to a few minutes. These pressure fluctuations arise 1. (a) from local hydrodynamic effects which are estimated; 2. (b) from nonpropagating pressure effects associated, for example, with a jet stream; 3.
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Abstract We consider atmospheric pressure variations in the period range from a few seconds to a few minutes. These pressure fluctuations arise 1. (a) from local hydrodynamic effects which are estimated; 2. (b) from nonpropagating pressure effects associated, for example, with a jet stream; 3.
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Trauma of the Ear from Infrasound
Acta Oto-Laryngologica, 1982Twenty-eight chinchillas received continuous or intermittent infrasound (1, 10, 20 Hz) at 150, 160, or 170 dB SPL; there were 7 controls. Serial sections of the temporal bones were examined using light microscopy. Pathologies noted were tympanic membrane perforation, stapes subluxation, bleeding from the middle ear mucosa and tensor tympani, strial ...
Daniel L. Johnson +3 more
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Meteors and Meteorites Detected by Infrasound [PDF]
Science, 1974 The Lamont-Doherty tripartite array of microphones has detected acoustic signals from meteors. These signals yield trace velocities which vary rapidly from supersonic to nearly infinite values for successive waves or wave groups, indicating a rapidly moving source.
Nambath K. Balachandran, William L. Donn
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