Step 1: Locate the doorbell cover
Step 2: Remove cover
NOTICE: there are two flat metal "chimes" next to the tubes?
Step 3: Choose your magnets
I choose pizza hut and A1 tattoos because who can resist a night out featuring pizza and piercings?
Step 4: Attach the magnets to the chimes
The magnets should stick to the metal chimes and you want them to be placed so the plungers strike the magnets when you press the doorbell.
This makes the magnet deaden the sound of the chime to the point that you hear the ding-dong but the really is no sustain to the notes. It's more of a "did-dud" and it's very quick.