Review and Case Study of Sounds Associated with the Lightning Electromagnetic Pulse
作者： Timothy A. Coleman , Kevin R. Knupp , John T. Tarvin
关键词: Light intensity 、 Geology 、 Acoustics 、 Electromagnetic pulse 、 Thunder 、 Digital video 、 Meteorology 、 Video camera 、 Spectrogram
摘要: Abstract The electromagnetic pulses (EMPs) associated with two lightning flashes on 22 July 2008 in central Alabama produced audible clicking sounds. These clicks were observed almost simultaneously the flashes, but a significant period of time before thunder. and sounds recorded digital video audio by camera. Based theories primarily developed to explain reports aurora meteors entering earth’s atmosphere, it appears that transduction energy at frequencies into vibrations objects near Coronal discharges are also possible. Examination spectrograms subsequent thunder, comparison measurements normalized light intensity each frame video, show must have been nearby objects. Therefore, EMP.
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