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flyover · September 2nd, 2004, 13:16

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Resonate frequencies.

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The other big factor is all the noise coming through the doors. When power is pushed up the cabin starts pressurizing and the doors seal. This can make a major difference in noise level. Sometimes there is such a gap in the door seals it sounds like the door is open until it pressurizes.

September 2nd, 2004, 13:16	#5
flyover Old Skool Join Date: Mar 2004 Location: Georgia Posts: 3,389	Re: Boeing 717 / MD80 question [ QUOTE ] Resonate frequencies. [/ QUOTE ] The other big factor is all the noise coming through the doors. When power is pushed up the cabin starts pressurizing and the doors seal. This can make a major difference in noise level. Sometimes there is such a gap in the door seals it sounds like the door is open until it pressurizes.