Before you start make sure you go to the toilet, drink water and all kinds of pending activities, be sure not to be bothered or interrupted.
Lie down or sit in a comfortable and quiet place, close your eyes, relax, breathe correctly, reduce all mental activity and remove all your thoughts, concentrate on the sound, and only on the sound, then even keep this thought away and leave your mind totally clean and white.
For the sound to have the desired effect, it’s indispensable to have headphones and the proper placement, place them in the right manner taking into account that a specific channel of the headphones corresponds to each ear.