Can I Find What Is Knowing?

The question that I found most instructive in that regard is not so much where is the mind but can I find what is knowing? So we hear a sound and we know we're knowing it. And then the question, Can I find what's knowing? Then it's an open question. We don't know whether we can find it or not. And we're looking to see if we can. How to distinguish knowing the state of mind from knowing the hindrance,. they seem to be overlapping. To overlap, in my understanding of how the foundations of mind are divided.