the noise made by a motion
sensor attached to doorways of various businesses to notify the employees someone has just entered the place of business (either to get their attention to
assist customer or for security reasons). Often seen at
dry cleaners
Family Guy episode shows Peter
Griffen walking into a dry cleaners and upon entering the noise "bing bong" was made by door sensor. After annoying the owner of the dry cleaners by waving hand in front of the sensor just to hear constant "
bing bongs," owner of the cleaners finally yells angrily "NO MORE
BING-BONG!"