Chimes are rapidly replacing doorbells or buzzers in popularity. They are attractive and the sound is very pleasant.
Most chimes have separate tones for front and back doors. This makes it easy to determine where the caller is standing when the chime is activated.
Chimes of various types can be purchased. Four note chime units can sound single notes for the back door and as many as eight notes for the front door. The writing diagram in Fig. 8 shows how a dual chime unit can be wired for one note to sound when the back door button is pushed and a two note chime activated by the pushing of the front door button. Note similarity between wiring a chime and a doorbell or buzzer.
Since chimes are usually much more attractive than bells or buzzers, most chimes are mounted out in the open, right on the wall of the room.
Again it should be remembered that the chime should always be mounted in such a location that it can easily be heard throughout the house.