Approach: Find out why we're unable to raise the requisite amount of money and
then solve the problem keeping wikipedia's mission and principles in mind.
Assumption: the person is completely incapable of hearing
Purpose of a doorbell: To inform the people inside the house when someone knocks
on their door.
An inconspicuous wearable that vibrates when the bell rings. This wearable should be
The Wearable can be a piece of jewellery say a ring or an earring.