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Fidelity of infrasound measurements with balloon-borne sensorsa).
J Acoust Soc Am
December 2024
Department of Physics, Naval Postgraduate School, 833 Dyer Road, Monterey, California 93943-5216, USA.
Deploying acoustic sensors on free-flying, long-living balloons helps to reach the areas not accessible with the traditional ground-based sensors, reduce flow noise, and improve characterization of various infrasound sources. Instrumented balloons can potentially increase the infrasonic detection range and early warning lead time for natural hazards. Balloons are also considered as platforms for planetary exploration.
View Article and Find Full Text PDFExplosion Detection Using Smartphones: Ensemble Learning with the Smartphone High-Explosive Audio Recordings Dataset and the ESC-50 Dataset.
Sensors (Basel)
October 2024
Infrasound Laboratory, Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i at Mānoa, Kailua-Kona, HI 96740, USA.
Explosion monitoring is performed by infrasound and seismoacoustic sensor networks that are distributed globally, regionally, and locally. However, these networks are unevenly and sparsely distributed, especially at the local scale, as maintaining and deploying networks is costly. With increasing interest in smaller-yield explosions, the need for more dense networks has increased.
View Article and Find Full Text PDFResting state network changes induced by experimental inaudible infrasound exposure and associations with self-reported noise sensitivity and annoyance.
Sci Rep
October 2024
Neuronal Plasticity Working Group, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
Article Synopsis
- A study was conducted with 38 participants to explore the effects of prolonged exposure to infrasound (IS) on brain function and connectivity across different neural networks, including the auditory, default mode, sensorimotor, and executive control networks.
- Results indicated decreased functional connectivity in the right precuneus (part of the default mode network) and increased connectivity in regions associated with sensorimotor and executive control networks, along with notable correlations with self-reported annoyance from the noise.
- This research is crucial as it is the first to analyze the impacts of long-term IS exposure on brain connectivity, suggesting the need for future studies to focus on individual differences in sensitivity and the relationship between annoyance and symptoms
Analysis of infrasound array data from tornadic storms in the southeastern United States.
J Acoust Soc Am
September 2024
Benchtop Engineering LLC, 281 Sweet Pond Road, Guilford, Vermont 05301, USA.
Article Synopsis
- In spring 2018, infrasound sensor arrays in the southeastern US were used to analyze data during a storm front that caused multiple tornado touchdowns, with intensities ranging from EF-0 to EF-2.
- The sensors managed to accurately determine the locations of the tornadoes, detecting signals from over 100 km away, as well as earlier weaker signals from a convective storm cell that didn't produce tornadoes.
- The analysis revealed that the main infrasound signals from the tornadoes fell within a frequency range of 2 to 6 Hz, with atmospheric conditions impacting signal detection and requiring advanced signal processing methods to distinguish between multiple storm sources.
Infrasound associated with the eruption of the Hunga volcano.
Philos Trans A Math Phys Eng Sci
October 2024
Division of Mechanics and Acoustics, National Institute of Metrology, Beijing 100029, People's Republic of China.
On 13-15 January 2022, the Hunga Tonga-Hunga Ha'apai underwater volcano erupted. This powerful eruption generated infrasonic waves with amplitudes of thousands of Pascals in the near field. The ground infrasonic stations in China, located approximately 10 000 km from the Hunga volcano, also received waves with frequencies from 0.
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