Mysterious rumblings were recorded in Earth’s stratosphere
By Ashley Strickland, CNN
Updated 3:33 PM EDT, Thu May 11, 2023
Giant solar balloons were sent 70,000 feet up in the air to record sounds of Earth’s stratosphere — and the microphones picked up some unexpected sounds.
The stratosphere...
A new research project in the Pacific region is aimed at determining whether bird movements triggered by infrasound could be tracked and exploited to give early warnings of disastrous weather and even tsunamis.
FULL STORY...
Not sure whether to post this here or in Ghosts. From the BBC:
'Sound waves so low in frequency that the human ear cannot detect them may be behind ghostly sightings and haunted buildings.
Human ears detect sounds in the frequency range of about 20 to 20,000 Hertz, or cycles per second...
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