laboratoryequipment:

Music of Aurora Borealis is Created Close to Ground

For the first time, researchers at Aalto Univ. in Finland have located where the sounds associated with the northern lights are created. The auroral sounds — which have been described in folktales and by wilderness wanderers — are formed about 70 meters above the ground level in the measured case.

Researchers located the sound sources by installing three separate microphones in an observation site where the auroral sounds were recorded. They then compared sounds captured by the microphones and determined the location of the sound source.

Read more: http://www.laboratoryequipment.com/news-Music-of-Aurora-Borealis-is-Created-Close-to-Ground-071012.aspx

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