Boeing 737 ambient noise during ascent
Hi all,
I have noticed that while the aircraft is ascending, the ambient noise from within the cabin increases, especially around the 20,000ft and onwards mark. From what I can tell, the engines appear to be at a constant thrust but the noise increases. Is this due to the air getting thinner the higher the aircraft goes? Cheers :) |
Hi Paul,
Possibly the noise of increased airflow as speed increases. I notice changes in cabin noise levels when accelerating or decelerating to/from 250kts below 10000ft, and again when slowing to configure for approach. Hope this helps. |
The cabin noise certainly seems to decrease markedly in the 737 at 39,000' and higher. Becomes lovely and peaceful up there.
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My 73 only goes to 37000 so I wouldn't know.....
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Smudger,try a NG rather than a red & silver one your notice a few changes. Even the Ng,s are getting old ?
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It would have to be related to pressurisation. IAS reduces as you climb above the mach-changeover point, which means less particles per second banging on the windows and therefore less impact noise. Hence the comment by Rainboe (bragger!:) ).
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Going from a CI of 35 to a nice low CI of 10 made a lot of differences, flying is relaxing and quiet in the Classic now (except for the screaming of those flying behind us).
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Originally Posted by Capn Bloggs
(Post 2874582)
less particles per second banging on the windows and therefore less impact noise.
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Just turn the recirc fan off.;)
Had to come back from FAO at .65 the other day, now that was peaceful! |
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