AURORAL ACOUSTICS - AURORA RELATED SOUNDS – NEWS
(modified July 2 2012/
page opened Oct 9 2001 / ukl)
THE LATEST NEWS OF THE PROJECT WILL APPEAR ON THIS PAGE
*July 2 2012 *
Sound source - possible associated
with aurora borealis - localized!
A
recording produced on Sept 9-10 2011 during a geomagnetic storm by using three
microphones and a VLF antenna picked up twenty similar clap sounds. Some of
them were close enough in order to be detected by all three microphones. The
collected data allowed the estimation of the
location of the sound source. The sound source was on the open sky.
Preliminary results will be published July 10 2012 in Vilnius:
The 19th International Congress on
Sound and Vibration, Vilnius, Lithuania, July 08-12 2012. http://www.icsv19.org/
- This
result is an important step in the project since its start in 2000.
- The
result shows that the sound source - at this particular case - was real and on
the sky, not far away from the ground.
- The
result DEOS NOT support speculations like: the auroral sounds are
-
- just illusion
- created by the brain of
the observer (purely subjective experience)
- caused by synesthesia (=illness!)
- created in the brain by
direct electromagnetic radiation
- created at the tips of
the trees
- created by frost and
ice (no frost nor ice on Sept 9 2011)
- created somewhere on
the ground – not on the sky
- The
result does not explain the
physical mechanism behind these clap sounds. It just estimates the location
of the sound source of this event!
*August 21 2007
*
Study
of Aurora Related Sound and Electric Field Effects [pdf]
This excellent Master's Thesis
by Janne Hautsalo describes statistical analysis of sound recordings
made at Koli, Finland April 11-12 2001 during a strong geomagnetic storm.
[read more: Old News]
PROJECT INFO, Old News etc . . .
Other project related material
can be reached via the: MAIN PROJECT PAGE.
Note: The former Helsinki University of Technology, (TKK)
Acoustics Laboratory is now part of the Aalto University Department of Signal
Processing and Acoustics at School of Electrical Engineering. http://elec.aalto.fi/en/