House is still abnormally quiet

Temperatures are dropping rapidly and after a short warm spell (50's high) tonight we are experiencing high winds and snow. Yet, in spite of all of this; the house is abnormally quiet. We had our younger dog out today from early afternoon til dark. But since we came home, she has been sleeping. My wife went upstairs a while ago and I have sat in the Library reading my mail. Thirty five MPH wind gusts outside (according to the local weather report) plus probably about an inch of snow and yet this house is quiet as a tomb. The house has been quiet since about the 18th of last month. No cracks, snaps, bangs, clatters, nor any extraneous sounds. At the moment the only sounds to be heard are my tapping the keyboard and an occasional squeak from the office chair I use with the computer. Old houses make strange sounds; but what about old houses that make no noise at all? I cannot remember a time in the past 35 years when this house has been this silent for more than a day or two. I guess the silence is bugging me.