High-Altitude Infrasound Recorded For First Time In 50 Years | Video

The sound was recorded by a UNC Chapel Hill payload aboard a high altitude balloon. The balloon was commissioned by Louisiana State University's High Altitude Student Platform (HASP) program and flew to an altitude of ~22 miles in 2014. <a href="http://goo.gl/kkg19i">Read more about the "eerie" sounds on Live Science</a>