do pacemakers ring?

Sitting in class at 10:10am on Monday morning, some students respond to the early morning stimulation of Spanish class differently than others. One of the most outspoken students regularly entertains me. His classmates keep him in line and he keeps us in stitches.

The recent quote came about when a cellphone's ring interrupted the studious atmophere.
"it's not a cellphone" he informed up, "it's a pacemaker."