Reccomended headphones are not good enough ?

[Dropout]

The headphones you recommend respond to "18 Hz to 21 kHz" like it says on the page. But the brainwaves actually respond to:

> 40 Hz = Gamma waves - Higher mental activity, including perception, problem solving, fear, and consciousness
13–40 Hz = Beta waves - Active, busy or anxious thinking and active concentration, arousal, cognition
7–13 Hz = Alpha waves - Relaxation (while awake), pre-sleep and pre-wake drowsiness
4–7 Hz = Theta waves - Dreams, deep meditation, REM sleep
< 4 Hz Delta waves - Deep dreamless sleep, loss of body awareness

You sell Alpha, Beta, Theta doses, but how will those work if your reccomended headphones go only from 18hz ?

[idoser]

Because the tones don't play at those freq - its the difference between two corresponding hertz that makes the listed freq in your hemisphere.