A prehistoric necropolis yields clues to the ancient use of sound and its effect on human brain activity.
Researchers detected the presence of a strong double resonance frequency at 70Hz and 114Hz inside a 5,000-years-old mortuary temple on the Mediterranean island of Malta. The ?al Saflieni Hypogeum is an underground complex created in the Neolithic (New Stone Age) period as a depository for bones and a shrine for ritual use. A chamber known as “The Oracle Room” has a fabled reputation for exceptional sound behavior.
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