Next time you get the "chills" in an empty room, don’t look for a ghost. Look for a vibrating pipe or a distant heavy truck. The secret is in the silence.
The culprit might not be supernatural. It might be infrasound. What is Infrasound? programma infrazvuka skachat
Use it to communicate over distances of several miles. Whales : Send deep-sea messages across entire oceans. Next time you get the "chills" in an
Infrasound—sounds below the 20 Hz threshold of human hearing—is a fascinating world of "silent" noise that affects everything from elephant communication to the way we perceive haunted houses. programma infrazvuka skachat