Yes, I think background music often goes unnoticed because it's meant to be quiet and not the main thing people pay attention to. Most of the time, people are too busy doing other things like talking or eating to notice it.

No, I don't think background music goes unnoticed. It actually plays a big role in setting the mood of a place, like a cafe or a store, even if people don't realize they're hearing it.

It depends. Some people might notice the background music if it's loud or if they really like music. But in places where there's not much going on, like in an elevator, more people might pay attention to it.