Why do airplanes get louder when approaching the airport?

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I live about 20 miles from a busy airport and am underneath one of the approaching flight paths. Often when a commercial jet passes overhead, it suddenly gets much louder, sort of like a car shifting down. It definitely sounds like the turbines are revving up. Why would an airplane get much louder while descending?

In: Engineering

4 Answers

Anonymous 0 Comments

planes land with they’re noses pointed upward, flaps up and landing gear down. All this creates drag. When there’s too much drag, the plane slows down too much and the plane starts falling too fast. To not fall so fast, more power is needed by the engines for a soft touchdown or to fall down slowly and also make it to the runway.

There’s more to it as well like the surroundings of the plane, etc

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