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"If you see and hear sometimes a strong continuous signal that runs for more than a minute or so, that is unlikely to be a meteor echo. VHF radio waves are sometimes affected by an unusual form of ionosphere propagation called "Sporadic E". During this event which can last hours or even days, the radio signal originating from the distant station is reflected by the ionosphere and meteor echoes are impossible to be detected. Sporadic E is specific to summer season in Northern Hemisphere. "

"For centuries, skywatchers have reported seeing and simultaneously hearing meteors whizzing overhead, which doesn't make sense given that light travels roughly 800,000 times as fast as sound. Now scientists say they have a potential explanation for the paradox."

"SONIC ACTS Festival - The Geologic Imagination Raviv Ganchrow: In the Company of Long Waves 1 March 2015 - Paradiso, Amsterdam, the Netherlands --- The saturated spectrum of infrasound suggests that toned-down sounds don't necessarily diminish. The lowest threshold of human hearing is also the upper register of an immense sonic territory that literally interfaces landmass with oceans and skies. Raviv Ganchrow introduces the theme of extensive acoustic waves in the context of his Long-Wave Synthesis project where marine oscillations, streaking meteors, calving glaciers, gas flares and nuclear explosions coexist; where sound become so heavy it's affected by gravity; and where oscillations slow down to such an extent that they spill over into weather."