Back in the days
Back in my college days, I once rented an upstairs apartment with a friend. My roomie and I didn't have a great stereo; it was a simple 2.0 bookshelf system. We often played records. (Yes, this was a while ago.) Our older downstairs neighbor, though, hated hearing the sounds, and often mentioned being disturbed by them if she saw us in the parking lot. We weren't jerks, but since we never blasted anything, we mostly ignored her, though we certainly made sure the volume was low after 9:00 or 10:00 at night. She wasn't mean about her complaints, though.
But one day she just had had enough. Up our stairs she came. We had music playing, though not to disturbing levels. She told us that she was frustrated, and asked if we could we please come down to her apartment to hear how our tunes sounded to her. OK, we said. So down we went with the record playing away at the same volume as it was when she knocked on the door.
We got to her apartment, and we heard absolutely nothing. She stood there with a stupefied look on her face, and apologized.
My roomie and I went back to our place, and we discovered that as the three of us had been walking down the stairs, the record had stopped and therefore there was no more music playing when we got to the woman's apartment. We never heard another complaint from the downstairs neighbor.
Chris