It is the Isha Kriya, I just tried. It’s purpose as I understood it, is to send the message at the cellular level that “I’m not the body, and I’m not the mind,” with using the sound that Sadguru tells. In-fact it is true, whatever we perceive we perceive in duality: the knower and the known — the knower is different from the known (body and mind); though we just know it intellectually but it doesn’t help, experiencing it only helps. I think this technique is all about that. My gratitude to Sadguru!

Note: this technique is free, and it may take you only 25 minutes to learn it through guided instructions.