Why are propeller planes so loud if they're so far away?

Why are propeller planes so loud if they're so far away?
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1 Answer

Answer :

Most of the time propeller planes do not have exhaust mufflers. this makes the engine extremely loud. and, since the airplane is on the ground, the earth acts as “bouncing board” for the airplanes loud engine. this bouncing effect makes the engines noise seem louder as it also bounces off of nearby objects, like a wall. in the air, propeller airplanes are not this loud, since they are away from you, away from the ground and in open space.
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