I bought a pair of Silent Earplugs, and the Seller promised absolute silence.
Solving the problem at its root.
After I put on the Silent Earplugs, the upstairs became quiet.
Three days later, the police came to my door. He said the person upstairs had been dead for three days.
But on the night I handed the Silent Earplugs to the police,
I heard the sound of a chair being dragged upstairs again.