Buzz My Ears Off

When packages are delivered to our apartment, the deliverer rings our buzzer before walking out the door to let us know we have a package. I usually know it's a package when my buzzer rings because nobody knows where I live to come visit. Last week I was waiting for my final textbook to arrive and 3 times in one day I went down for a package only to find it was for my neighbor in apt. 8. Since then it's happened twice more. I saw my neighbor in the hall for the first time and asked if her buzzer worked. She said yes and that it was the loudest thing she's ever heard. Turns out, it's not actually ringing in my apartment, but only that I can hear it so well in the back of mine it sounds like it's my own buzzer. I have never heard any other sound from next door besides that. Oh well, at least now 5 of her packages have been delivered to her door by me thanks to the shrill of her buzzer.