Sounds of Northern Lights recorded at Aalto University in Finland

See on Scoop.itNWT News

[excerpt]

“….Our research proved that, during the occurrence of the northern lights, people can hear natural auroral sounds related to what they see. In the past, researchers thought that the aurora borealis was too far away for people to hear the sounds it made. This is true. However, our research proves that the source of the sounds that are associated with the aurora borealis we see is likely caused by the same energetic particles from the sun that create the northern lights far away in the sky. These particles or the geomagnetic disturbance produced by them seem to create sound much closer to the ground, said Professor Unto K. Lainefrom Aalto University.Details about how the auroral sounds are created are still a mystery. The sounds do not occur regularly when the northern lights are seen.

The recorded, unamplified sounds can be similar to crackles or muffled bangs which last for only a short period of time. Other people who have heard the auroral sounds have described them as distant noise and sputter.

Because of these different descriptions, researchers suspect that there are several mechanisms behind the formation of these auroral sounds. These sounds are so soft that one has to listen very carefully to hear them and to distinguish them from the ambient noise.

The Aalto University researcher’s study will be published in the proceedings of the 19th International Congress on Sound and Vibration. The congress is held in Vilnius, Lithuania on 8 to 12 July 2012….”

For more information, please contact:
Professor Unto K. Laine
Aalto University, School of Electrical Engineering
unto.laine@aalto.fi
tel. +358 9 470 224 92

Researcher’s website http://www.acoustics.hut.fi/projects/aurora

See on www.aalto.fi

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