http://www.techlib.com/science/sciencefair.htm

http://www.tomshardware.co.uk/forum/38947-32-infrasound-detector

http://online.physics.uiuc.edu/courses/phys403/303Project/Fall2003/DetectionOfAtmosphericInfrasound_by_ChrisOrban_2003Fall.pdf 

http://odin.bek.no/~xxxxx/tyburn_seymour_st_cross_site.wav