The answer isn't entirely existential when it comes to doorbells. Still, there is no single answer. ElectraChimes are meant to be seen, and heard. As a rule of thumb, we recommend the top of the chime be hung just above eye level at about six and one half feet on a standard eight foot wall.
Here are two installations close to the the ceiling.
In the first example, a Coronet with a custom walnut cover and nickel-plated bells rests comfortably in a newly constructed home in Connecticut. The homeowner could have built the chime niche anywhere they wanted, yet chose a location near the ceiling.
The Texas installation at right is a Coronet with three brass bells at the former location of a more modest doorbell. This negated the need for the homeowner to move the wires and patch the wallpaper.
As a practical matter, playful children and pets are less likely to play with the tubular bells when they are mounted just out of reach.