The noise is unbelievable. You don't notice it because it's constant. That noise is the worst. She wears ear protection whenever she flies. Some airline companies are listening, and they are spending millions to make their planes less noisy.
Every airliner has a different voice.
Newer jets with engines mounted away from the body of the plane on the wings appear to be among the quietest in the nation's fleet. One reason is that these newer jet engines use larger fan blades that move more air with less combustion and therefore less noise. Older jets, however, are among the noisiest. And propeller planes, while not as noisy outside, make a huge racket inside the cabin. Prop chop Bombardier Aerospace, the third-largest airline manufacturer in the world, behind Boeing and Airbus, began working to make its turboprop airplanes quieter in 1988.