At 9:56 PM +0000 12/1/02, Nathan Bower wrote: >I have heard that organs can create beat frequencies below the normal >percieved cutoff of the human ear (5-10hz). Does this fit in with what you >are saying? Any two frequencies 5-10 HZ apart will create beat pulsations identical to the difference in their frequencies. Ya ever tune a piano? >Do we just 'imagine' the very low frequency, or does it really >exist? Sarah put quite clearly. It's an amplitude modulation in the summation of two frequencies which are separated by 12-15Hz (the frequency at which the human brain turns a pulse into a tone), but most importantly, which themselves are with in our hearing range. >N B (as long as I don't sign my name, i can talk anyway i like.)
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