building stuff, more stuff, and a little bit of… stuff
UPDATE: On its own, this may not be enough to ensure a good nights’ sleep, and may have other effects. If you use a Neurophone at the same time as this setup, it may intensify the effects of the Neurophone.
It turns out “earplug-style” (in-ear-monitor) headphones affect the brain in at least some of the ways a real Neurophone does. If you want the freedom of thought that the pink-noise Neurophone brings, an even more effective way of getting it turns out to be the following:
Get some earplug-style headphones. Make sure they produce a good seal. One person used Sennheiser CX150s, which cost $18-30.
Plug them into a pink noise generator. Use a good one! (Like this design: http://sound.westhost.com/project11.htm )
And that’s it! If you want to sleep incredibly well, try this at night. A bit of medical tape under the ears will hold the cables in place.
One heads-up: For maximum fidelity of the pink noise signal, it may help to use a headphone amplifier between the headphones and the pink noise generator. This is an easy-to-build design: