As an attention-getting device the yodeling emergency button is barely passable. The yodel is quiet, and the students either giggle or yodel loudly when it is played. As a community-building device, however, it has come in handy. I put it up one day, and no one noticed until I began to run around asking if there was an emergency.
"Is there an emergency? Wait? Is this an emergency? I think we have an emergency!" Each time playing the yodel and often trying to sing along.
Now, whenever we have a guest or a new student, the students teach them to ask me if there is an emergency. And, of course, there always is. Yo-del-ay-e-hoo!