Results 21 to 30 of about 4,944 (223)

Acoustic Waves From a Distant Explosion Recorded on a Continuously Ascending Balloon in the Middle Stratosphere

Geophysical Research Letters, 2023
A helium‐filled mylar balloon carrying a smartphone and infrasound sensors ascended to a stratospheric height of 35 km over the surface detonation of a chemical explosive, with a total acoustic propagation distance of 127 km.
S. K. Popenhagen, D. C. Bowman, C. Zeiler, M. A. Garcés   +3 more
doaj   +1 more source

Autocorrelation Infrasound Interferometry

Journal of Geophysical Research: Solid Earth, 2021
AbstractSeismic and infrasound multistation ambient‐noise interferometry has been widely used to infer ground and atmospheric properties, and single‐station and autocorrelation seismic interferometry has also shown potential for characterizing Earth structure at multiple scales.
Hugo D. Ortiz, Robin S. Matoza, Jeffrey B. Johnson, Stephen Hernandez, Juan C. Anzieta, Mario C. Ruiz   +5 more
openaire   +4 more sources

High-speed echoes in the polar winter mesosphere: Infrasound as a probable cause [PDF]

, 2023
We considered three events on 4 November 2015, 22 December 2016, and 12 November 2018, when the signals travelling in the polar winter mesosphere with high horizontal velocities above 300 m/s were measured by the atmospheric radar ESRAD (Chilson et al ...
Belova, Evgenia,, Evgenia Belova, Näsholm, Sven Peter, Ekaterina Vorobeva, Godin, Oleg A.,, Godin, Oleg A., Vorobeva, Ekaterina, Victoria Barabash, Kero, Johan, Barabash, Victoria, Vorobeva, Ekaterina,, Kero, Johan,, Pichon, Alexis Le, Oleg A. Godin, Le Pichon, Alexis, Barabash, Victoria,, Näsholm, Sven Peter,, Sven Peter Näsholm, Belova, Evgenia, Alexis Le Pichon, Le Pichon, Alexis,, Johan Kero   +21 more
core   +1 more source

Exploring Background Noise With a Large‐N Infrasound Array: Waterfalls, Thunderstorms, and Earthquakes

Geophysical Research Letters, 2023
Ambient infrasound noise contains an abundance of information that is typically overlooked due to limitations of typical infrasound arrays. To evaluate the ability of large‐N infrasound arrays to identify weak signals hidden in background noise, we ...
L. T. Scamfer, J. F. Anderson
doaj   +1 more source

Skyfall: Signal Fusion from a Smartphone Falling from the Stratosphere

Signals, 2022
A smartphone plummeted from a stratospheric height of 36 km, providing a near-real-time record of its rapid descent and ground impact. An app recorded and streamed useful internal multi-sensor data at high sample rates.
Milton A. Garcés, Daniel Bowman, Cleat Zeiler, Anthony Christe, Tyler Yoshiyama, Brian Williams, Meritxell Colet, Samuel Takazawa, Sarah Popenhagen   +8 more
doaj   +1 more source

SilberPrime/infrasound-signal-arrival-azimuth: v2.7.1

, 2021
This release includes the Matlab functions that calculate the infrasound signal arrival parameters: distance in km and degrees, back azimuth, and arrival times for three main propagation channels (tropospheric, stratospheric, thermospheric ...
Dr. Elizabeth A. Silber
core   +1 more source

Measurement and Analysis of Infrasound Signals Generated by Operation of High-Power Wind Turbines

Energies, 2021
The development of wind energy and the increasing number of installed wind turbines make it necessary to assess them in terms of the nuisance of the emitted infrasound noise generated by such devices.
Tomasz Malec, Tomasz Boczar, Daria Wotzka, Michał Kozioł   +3 more
doaj   +1 more source

Evidence for Short Temporal Atmospheric Variations Observed by Infrasonic Signals: 1. The Troposphere

Earth and Space Science, 2022
Infrasound monitoring is used in the forensic analysis of events, studying the physical processes of sources of interest, and probing the atmosphere.
G. Averbuch, M. Ronac‐Giannone, S. Arrowsmith, J. F. Anderson   +3 more
doaj   +1 more source

Temporal integration of infrasound at threshold. [PDF]

PLoS One, 2023
Infrasounds are signals with frequencies below the classical audio-frequency range, i.e., below 20 Hz. Several previous studies have shown that infrasound is audible as well, provided that the sound level is high enough. Hence, the sound pressure levels at threshold are much higher than those in the classical audio-frequency range.
Friedrich B, Joost H, Fedtke T, Verhey JL.   +3 more
europepmc   +3 more sources

On the Measurement of Infrasound [PDF]

Geophysical Journal of the Royal Astronomical Society, 2010
Summary The physical properties and propagation characteristics of atmospheric infrasound determine the techniques and instrumentation used for its measurement. The physical properties which influence the design of the measurement system for infrasound are summarized, and the techniques and instrumentation used for measurement are described ...
Richard K. Cook, Alfred J. Bedard
openaire   +1 more source