Hi Grampa, and welcome to the forum. I want to assure you I run the place with the utmost respect for any and all who share here. I realize you are hesitant to share details, but quite frankly, the only way to determine if something is a paranormal occurance is to rule out everything else. And that's where details come into play. Knowing if you have other activity going on, if you have had other psychic occurances in the past, if there is a chance a spirit is in a home that may know you and is trying to pass a message...things like this all lead you to the possible truth of the activity. Going simply from what you have shared, the sounds could possibly be paranormal in nature. Especially the knocking. Knocking is common in visitation events. The fact someone else also herd them is good, if for no other reason it assures you you aren't going crazy. From what I'm feeling from your story is that there is much more there than you are sharing that links into this. Take that knowledge and see if it might match a loved one trying to reach out to you or other family members. If activity continues, let us know, as not all activity is good activity. If you prefer to share more one on one with me, please feel free to private message me. I would be happy to help you any way I can. I have 60 years experience with this and am willing to assist if I can.