What type of energy is used in a doorbell use?

Answer 1

This snippet is taken from the New England Breeze Newsletter (http://www.newenglandbreeze.com/nl/TEM20080901.html):

There are about 5,000 homes in Hudson (MA). Lets assume that 80% of the homes have working doorbells. 80% x 5,000 = 4,000. Let's also assume that all the doorbells draw 3 watts (I bet the older ones draw more). 4,000 x 8,760 x 3 / 1,000 = 105,200 kilowatt hours per year - enough electricity to power 10.5 average homes for a year. Ouch.

Want scarier? As of the year 2007, the US Census estimates that Massachusetts has approximately 2,700,000 households. Again, assuming 80% have working doorbells like mine, that's 2,160,000 doorbells using 3 watts of power. 56,764,800 kilowatt-hours or 56.7 megawatt-hours of electricity to run Massachusetts' Doorbells. Enough to power 5,676 average homes for a year (all of Hudson's homes in fact).

How about the nation? The US Census estimates 127,901,934 homes. Using the same 80% assumption, that's 2,689,010,261 kilowatt hours. Enough power to run about 268,900 average homes for a year. (95% of the homes in Alaska or 100% of the homes in Wyoming).

Nationwide, each kilowatt-hour of generated electricity is responsible for about 1.34 lbs of carbon dioxide. 2,689,010,261 kilowatt-hours leads to 1,801,640 tons of carbon dioxide in our atmosphere... for doorbells.

Answer 2

A door bell or chime uses electrical energy: either from a transformer plugged into a mains power socket, AC input to DC output; or batteries. If the system is remote, there will be at least two AA or AAA batteries in the bell or chime part, and a smaller battery in the bell push fixed to the outside of the front door.

Answer 3

A doorbell typically uses electrical energy to operate. The electrical energy powers the mechanism that produces the sound when the doorbell is pressed.

Answer 4

Sound energy