Vow of Silence

From when my kids go to school, 8am, to when they come home, after 3pm, I do not talk to anyone. The phone does not ring, no one comes by, I have no other children in the home. I feel as if I take a vow of silence for the morning and part of the afternoon. I hear myself say words but there is no proof that I am saying them aloud (almost like when the kids are home). I think I just speak in my head. I watch TV but am weary of yelling at the characters for fear of making them my friends.