As you're sitting on the plane and waiting for takeoff, your airline pilot could activate a "ding" sound mid-flight — but what does that sound really mean? In a now-viral video garnering nearly 10 ...

No matter which airline you’re flying, the experience of boarding a plane and taking off is practically the same for all passengers. This includes not only the things we know to expect (waiting for ...

This is a simple and very useful article on building a circuit that produces “ding dong” sound using 555 timer. We observe different types of door bells in different houses. They produce different ...

HOUSTON -- An 11-year-old boy was shot and killed while playing a doorbell prank with friends on Saturday night in southeast Houston, police said. The shooting happened just after 11 p.m. on Saturday.

A conventional doorbell often uses a physical bell, or a digital equivalent with a rudimentary speaker, to make the ...