The upper atmosphere contains a sound waveguide channel.
the verdict
SUPPORTED
the evidence backs this
confidence 81/100
The upper atmosphere functions as a sound waveguide channel, allowing low-frequency infrasound waves to travel long distances via stratospheric and thermospheric ducts.
Evidence for · 4
Rich observations of local and regional infrasound phases made by the AlpArray seismic network after refinery explosion.
2019 · cited by 7
Paper [3] identifies tropospheric, stratospheric, and thermospheric acoustic phases that act as waveguides for infrasound propagation over long distances.
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More for · 3
Evaluation of infrasound signals from the shuttle Atlantis using a large seismic network.
2008 · cited by 7
Paper [4] discusses infrasound energy ducting through atmospheric layers such as the stratospheric jet.
Assimilating atmospheric infrasound data to constrain atmospheric winds in a two‐dimensional grid
2021 · cited by 7
Paper [5] examines infrasound waves travelling through atmospheric channels in the upper atmosphere.
Efficient modeling of atmospheric infrasound propagation with the Semi-Analytical-Finite-Element (SAFE) method
2024 · cited by 2
Paper [11] explicitly details how downward refraction in the atmosphere enables infrasound to propagate efficiently inside acoustic waveguides.