The phenomenon of falling stars, since ever, has fascinated men. In the middle age together with the comets they were considered premonitory signs. Exactly we don't know it yet.
Several studies show that falling stars, during their combustion emit electro-phonic signals.
This theory, confirmed by some observations, shows the maximum level of these signals around 12 kHz. A viable physical explanation was not found until 1979 when Colin Keay in Australia investigated reports that a huge fireball which passed over Sydney and Newcastle, NSW, a year earlier had been heard while it was in view by many observers. The picture show many tweaks at 1.8 kHz, and various noise below 1.4 kHz. Are also evident the negative compression effects on the quality signal. During the night was captured more than 200 episodes.