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 ...

There's often a range of noises on flights, from the seatbelt sign ding to the squeaky wheels of the food trolley. During the journey, there's also a double chime sound that usually goes unnoticed, ...