Raps, taps, popping, I heard these before all the activity started, they do it to let you know they are there, basically like a hint before they do something more.....many people call these things paranormal, but even all the paranormal things that happen are done usually for a reason, you just have to ascertain it. I have learned a lot in the past seven years, and I thank Erica my spirit guide angel, never did I meet such a human or another spirit like her, She reminds me of Jesus Christ, compassionate, gentle, comforting, Again like many times I thank the Lord for sending her to help and encouraging me....there's a reason for everything, we just don't always see what the reason is, but usually we may feel it, I have seen and felt it, and then some.
Taps I call it hints, here I am, don't be afraid, I believe this to be spirits from other dimensions.