BrainWave Generator online

http://mynoise.net/NoiseMachines/isochronicBrainwaveGenerator.php

1 Hz @ 27.5 Hz - Delta | Lethargic 
2 Hz @ 55 Hz - Delta | Deep Sleep 
3 Hz @ 110 Hz - Delta | Dreamless 
4 Hz @ 220 Hz - Theta | Drowsy 
6 Hz @ 440 Hz - Theta | Fantasy 
8 Hz @ 880 Hz - Alpha | Relaxed
12 Hz @ 1,720 Hz - Alpha | Conscious
16 Hz @ 3,520 Hz - Beta| Focussed
24 Hz @ 7,040 Hz - Beta| Active 
32 Hz @ 14,080 Hz - Beta | Fear /!\