Omg! I couldn’t believe this!!! So I have very noisy neighbors above me. The whole day footsteps sound like their about to break the floor. I left many notes in their apartment and nothing changes AND... I have a 6 month baby that wakes up every night because of them. Unfortunately their old people and i can’t get mad at them because of their age, so I decided to look for solutions to fix this and cane across this. I just placed some under the baby’s crib because I didn’t know how it would work and I placed some by the door because I had left over. Let me tell you that OMG! No noise (and I only bought one pack) the baby slept all night long and me and my husband finally got rest. I waited this morning for them to make noise but nothing, all the noise was now in the living room and kitchen but not in our room