there's a bell at my uni (not actually figured out what building it's in actually) that, every hour on the half hour plays a song. it's different songs, always melodies you know but not always ones you can name (though sometimes it plays like ELTON JOHN it's really bizarre). i have no idea what purpose this serves and i would probably go crazy if i lived anywhere near it.
edit:
http://www.wku.edu/library/dlsc/ua/191.htm"The tone of a bell has the unique ability to reach people by awakening a natural inner response of well being. This response may be emotional, joyful, prayerful, brotherly or whatever. The music of bells is the voice of life and its many facets of individual response. May your enjoyment of the bells be satisfying and memorable. "
Oh I suppose THAT'S why :/ Actually it doesn't do this though. It really, really creeps me out. Elton John songs might be fun until you hear them played on bells, then every song they play sounds like a slow funeral.