The ear-resetting scan tone
According to French ENT specialist Dr. Alfred Tomatis (1920-2001), abilities such as attention and learning can be improved by retraining the ear to listen tosounds. This type of sound indeed provides a good stimulus to the brain's neurons. According to Dr Tomatis, once the ear is retrained - typically after a series of listening sessions extending over a couple of weeks - individuals concentrate better, and learn more efficiently.
This generator covers the entire audible spectrum: sounds tend to achieve the opposite effect, such as inducing relaxation and drowsiness: they may not be suited to improving your learning abilities, but are definitely worth trying when suffering from anxiety and insomnia. are for the lower frequencies and relaxation; are associated with the higher frequencies and alertness. Set the sliders according to these generic guidelines, adjust them to a position that intuitively feels right for you personally, then put more emphasis - only slightly - to the lowest slider(s) if you are about to experiment with relaxation, or the highest one(s) if you want to retrain your listening skills according to the Tomatis' theory. In this latter case, get into the habit of listening to your custom sound regularly over a couple of days, by continuing to emphasize the highest sliders as the training progresses.