Results 21 to 30 of about 16,386 (293)

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.
Björn Friedrich, Holger Joost, Thomas Fedtke, Jesko L. Verhey   +3 more
openaire   +3 more sources

Volcano Infrasound: Progress and Future Directions [PDF]

Bulletin of Volcanology, 2022
Over the past two decades (2000–2020), volcano infrasound (acoustic waves with frequencies less than 20 Hz propagating in the atmosphere) has evolved from an area of academic research to a useful monitoring tool. As a result, infrasound is routinely used
Anderson, Jacob F., Johnson, Jeffrey B.
core   +3 more sources

Bi-Stable Metamaterials with Intrinsic Memory for Selective Wave Filtering Based on Frequency and Amplitude. [PDF]

Adv Sci (Weinh)
By inducing phase changes in metamaterials using topological solitons, the authors show effective control of harmonic waves based on frequency, amplitude, and specific combinations of both. In addition, the metamaterial retains a record (i.e., have memory) of extreme events without changing its main functionality of either blocking or transmitting ...
Stenseng NN, Samak MM, Bilal OR.
europepmc   +2 more sources

The Dominant Source Mechanism of Infrasound Generation in Powder Snow Avalanches

Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.
Abstract Powder snow avalanches (PSAs) radiate infrasound energy, yet the source mechanism remains unclear, limiting hazard monitoring and mitigation with infrasound‐based technologies. Here, we analyze a unique data set from a large PSA to improve the understanding of the source mechanism.
B. Sovilla, E. Marchetti, M. L. Kyburz, A. Köhler, P. Huguenin, I. Calic, M. J. Kohler, E. Suriñach, C. Pérez‐Guillén   +8 more
wiley   +2 more sources

Study on Optimization of Infrasound Filtering Method for Coal Sample Failure under Load

Frontiers in Earth Science, 2022
Effective filtering of the infrasound signal generated by coal samples is the basis for realizing the prediction of the infrasound of coal sample damage.
Jianguo Zhang, Man Wang, Bing Jia, Yujie Wang   +3 more
semanticscholar   +3 more sources

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

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.
Anderson, J. F., Arrowsmith, S., Averbuch, G., Ronac-Giannone, M.   +3 more
core   +3 more sources

Infrasound Thunder Detections across 15 Years over Ivory Coast: Localization, Propagation, and Link with the Stratospheric Semi-Annual Oscillation

Atmosphere, 2021
Every day, about one thousand thunderstorms occur around the world, producing about 45 lightning flashes per second. One prominent infrasound station of the International Monitoring System infrasound network of the Comprehensive Nuclear-Test-Ban Treaty ...
T. Farges, P. Hupe, A. Le Pichon, L. Ceranna, C. Listowski, A. Diawara   +5 more
semanticscholar   +3 more sources

Gharial acoustic signaling: Novel underwater pops are temporally based, context-dependent, seasonally stable, male-specific, and individually distinctive. [PDF]

J Anat
Male gharials (Gavialis gangeticus) produce loud underwater POPs by rapid jaw clapping 1–3×. POPs are temporally based, context‐dependent, seasonally stable, and individually distinctive. The bulbous, cartilaginous “ghara” atop the snout is a sexually dimorphic unique feature.
Ajji M J, Lang JW.
europepmc   +2 more sources

Perspectives and challenges in bolide infrasound processing and interpretation: A focused review with case studies [PDF]

Remote Sensing. 2024; 16(19):3628
Infrasound sensing plays a critical role in the detection and analysis of bolides, offering passive, cost-effective global monitoring capabilities. Key objectives include determining the timing, location, and yield of these events. Achieving these goals requires a robust approach to detect, analyze, and interpret rapidly moving elevated sources such as
Elizabeth A. Silber
arxiv   +3 more sources

Detection of the Large Surface Explosion Coupling Experiment by a Sparse Network of Balloon-Borne Infrasound Sensors

Remote Sensing, 2023
In recent years, high-altitude infrasound sensing has become more prolific, demonstrating an enormous value especially when utilized over regions inaccessible to traditional ground-based sensing.
E. Silber, D. Bowman, Miro Ronac Giannone   +2 more
semanticscholar   +1 more source