Please, please, people don't do this incautiously. I've read that
commercial devices such as the BT6pro for electrical stimulation are
designed with circuitry that guarantee that "pulses are Bi-Phasic
(AC) with no DC or offset bias. Output is transformer coupled so that
no direct current can appear at electrodes. The algebraic sum of
positive and negative-going pulses is zero. This obviates any
possibility of cellular membrane electrolysis, ion migration, or
polarization of neuronal tissue."
You really do not want to permanently damage brain cells, which I
fear you are doing by applying unrefined electrical input to the
ears. You may not notice a small cognitive deficit right away, but
by the time you do after multiple attempts, it will be a bit too late.
--- In firstname.lastname@example.org
, "Kiarash_m <kiarash_m@y...>"
> After reading about voodoo machine, I used my guitar amp to do the
> same as it does.
> I connected the speaker output to my ears using that paper
> things whatever (:put rught wnglish word here:).
> Then I connected the output of youndcard to the amp input and made
> some frequencies (4hz sinus, 4hz sawtooth, 10hz sinus
> and "electrified" my ears with them.
> (Be sure to have a loop starting and endig with 0 (use "zero
> crossing") or you will get a painful click everytime the loop
> what I felt.
> I felt as I couldn't think really well. At high volumes my eyes
> started to flicker with the frequency (pretty weird). The
> electrifieng feeling in the ears is very annoying (higher volumes
> are sometimes less annoying (!!))
> I am not really sure if I'm going to fo further and use it for more
> than 1 min. (I don't want to damage my beloved brain you know)
> We could reduce the personal damage if more than one person try ;)
> So if you're a freak like me