A pilot demystifies the "ding" sound heard on airplanes. It's not an alarm, but a signal for the crew. One ding signifies takeoff clearance, another at 10,000 feet allows cabin service to begin, and ...
What That “Ding” Sound on Flights Really Means: If you have ever travelled by air, you have probably heard the familiar “ding” sound on flights while sitting in your seat or looking out of the window.