What does a heartbeat sound like in the quietest place on Earth? This is an anechoic chamber: a room completely void of reverberations. Located at Orfield Laboratories in Minneapolis, MN, the chamber has been dubbed the “world’s quietest room.” After just 30 minutes inside, you start to hear your own heartbeat. In fact, the first half of this video is an audio recording of a heartbeat made inside the room's padded walls. Orfield Laboratories test the sounds of things—from consumer products to me

The anechoic chamber at Orfield Laboratories in Minnesota is the quietest place on Earth, holding the Guinness World Record with a sound level of -24.9 decibels. The intense silence is so disorienting that people begin to hear their own internal sounds, like their heartbeat and blood rushing. This sensory deprivation can cause hallucinations and a loss of balance, which is why the longest anyone has been able to tolerate it is just 45 minutes. - 📹 HIFI RETRO | Entrelligence