The mysterious sound is captured outside the Earth

For the first time in 50 years, scientists have obtained sounds of frequencies below 20Hz (below the level of human self-hearing) from the outer edge of the universe.

Reveal the mysterious sounds obtained outside the Earth

An experimental balloon, with infrared microphones attached to the interns at the US Aerospace Agency (NASA) obtained strange alien sounds. The recording shows hissing and hissing sounds at the top of the Earth 36km.

According to LiveScience, the person who discovered the mysterious sounds was Daniel Bowman, a student at the University of North Carolina (USA). Bowman was able to capture sound waves at frequencies below 20Hz, which the human ear could only hear if it increased the speed of the recording, when dropping the balloon above New Mexico and Arizona in August. last.

The balloon has floated all the way up to 725km above the Earth's surface and reached a peak height of over 37,500 meters. This is the first time a sound research instrument under 20Hz can achieve such a height.

An important feature of sound below the hearing threshold of the human ear is that they always travel very far distances. Although some natural phenomena such as hurricanes or earthquakes can cause sound below 20Hz, researchers still do not know the "culprit" that causes sounds below the hearing threshold of human ears in the recording Bowman's.

Many theories have been proposed to explain the origin of strange sounds, from a wind farm under the path of a balloon, to ocean waves, gravity waves or air turbulence or even lice is the sound from the motion of the balloon cable.

A project funded by NASA is now planned to add new instruments to record many more strange sounds later this year for research.

Although the above sounds have not been decoded, the European Space Agency (ESA) has gathered more familiar sounds from space into a collection and shared it on esaops Soundcloud. In it, it is worth noting that a clip uses the recording data of the Huygens explorer ship when it lands on Saturn's moon Titan on January 14, 2005.