Re: Sessions frequency clarification requested
Srikrishna,
Just a note on binaural beats and headphones. The 20Hz-20KHz range of headphones is simply the audible range of hearing. Headphones will reproduce sounds at that range of frequencies, although with different levels, as shown by a frequency response spec chart supplied with some gear.
But this has nothing to do with binaural beats which are synthesised internally by the human brain. The different frequencies in each ear are well above the lowest frequency that the headphones can reproduce, and the binaural difference beat is produced (again) by our brain.
Even very cheap headphones can do this adequately. But good headphones are more comfortable to use, and sound better due to more flat frequency response. I prefer earbud type phones, which are less hassle to wear given al the other wires and bits associated with current state of brainwave entrainment technology.
And don't forget that brain entrainment only works when you present a steady signal for some time. Brain needs time to get 'sucked in' so do not be too adventurous with changing frequencies! Unless you are wanting pure entertainment which is another interesteing topic altogether.
Richard, Hong Kong
richardhk dot com
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