did-you-kno: The quietest place on Earth is an acoustics and architecture test facility in Minnesota. The -9 decibel level is overwhelming because you can easily hear your own heartbeat, breathing, and stomach gurgles. Most people can’t last 20 minutes
tags: SŦXNɆĐɃXɎ,
from: https://imahighnation.tumblr.com/post/100704532877