A pilot has revealed what those scary ‘ding’ noises are that you hear on planes

When you’re on a plane, any unexpected noise leaves you feeling a little uneasy, like those “dings” that you hear a few minutes after takeoff. But there’s no need to be scared.

A pilot has finally revealed was those strange “dings” actually are, and it’s not the flight attendants making a warning about any sort of danger.

Speaking on TikTok, Peter Cappio explained that it’s just the pilot’s way of showing that the aircraft has gone past a particular altitude.

“Those dings that you hear throughout the cabin are when the pilots are climbing through or descending through 10,000 feet,” he explained.

So, why do they need to alert everyone? Well, 10,000 feet is actually a very significant altitude in the aviation world because it’s when you’re out of “sterile cockpit”.

“Sterile cockpit” is a plane rule that says flight attendants are only allowed to carry out activities required for the safe operation of the aircraft during critical phases of the flight, like taxi, takeoff, initial climb and landing.

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During this time, they’re not allowed to speak, get up or do any non-essential activities, to minimise distractions and make sure they are fully focused. They can’t contact the pilot either unless it’s an emergency.

Once they are out of this phase, they are able to carry out non-essential tasks, like giving out food and drink, cleaning the toilet and having conversations with each other.

So, the “ding” noise lets the flight attendants know that they are no longer in this “sterile cockpit” phase, and they can start doing other tasks again.

“It signifies when the flight attendants are usually clear to get up out of their seats, start their service and do all of that stuff,” the pilot explained.

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At this point, they are also able to contact the pilot for non-essential reasons, like asking them if they want a coffee, because they no longer need to be fully focussed on take-off.

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