I don’t think so, I mean, not consciously.
The pattern is like this, I start the field, and let go all my thoughts, shortly afterwards my forehead (I think it’s where the third eye is located) start vibrating, and when I focus on this sensation, while keeping my eyes closed and my body fully relaxed, those waves start to appear.
Maybe it is a Kundalini energy awaking but I don’t know, should not the snake start from the root and rise to the crown? I basically can’t feel very much below the solar plexus, generally if I feel I feel at my heart level and forehead.
Btw I like what I’m experiencing