When analyzing the rod, which the audience can hear emits an audible low frequency hum, a somewhat qualified guess, without having a sound level meter at hand, below 300 HZ. Yet the scientist testing it claims it emits a frequency of 12.4 KHZ or 12400 HZ which is in the high frequency audible range. (@1h14m)

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21-12-2012 La profezia dei Maya (2011)

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