The Vishuddha or clairaudient power is related with all the seven Tattvas but more particularly to Akash because Akash is the origin of all of them. And this is what we are explaining here. For instance, your own particular body has the chakra of the throat, the plexus or the throat which is that particular energy that enters your physical body and is the church of Sardis or chakra Vishuddha; and also in the vital body, and also in the astral body, the mental body, the causal body, and Buddhic body; in all the bodies that chakra vibrates. And this is why you have to understand and comprehend that in each level the chakra vibrates in different frequencies; we have to understand that.