744 From United States of America, joined Aug 2001, 450 posts, RR: 0 Posted (7 years 4 months 1 day 19 hours ago) and read 5881 times:
I just flew back from HKG yesterday on CX 870 Tail Number B-HUG.
I got a whole row 63 ABC to myself in the rear end of Economy Cabin. As soon as the aircraft went airborne, the engines were so loud that we could not hear any PA announcements or the crew requests during beverage and meal services. It was very hard to even hear the inflight entertainment system throught the flight. I could bearly sleep as the engines were buzzing all night. I have flown many other 744's and have never experienced this. On the outbound flight on CX 744, I was seated in row 53K (whole row) tail number B-HOZ where similar problem was faced. What would be the reason for the engines to be super loud? Is it because the aircrafts would have been really old? Can thoughts?
Kappel From Suriname, joined Jul 2005, 3533 posts, RR: 16
Reply 1, posted (7 years 4 months 1 day 17 hours ago) and read 5764 times:
It's because you were sitting in the back, even the a340 is loud in the back. If you sit above or in front of the wings the next time, you'll notice a big difference. It has nothing to do with the age of the aircraft.
Spacecadet From United States of America, joined Sep 2001, 3968 posts, RR: 10
Reply 2, posted (7 years 4 months 1 day 17 hours ago) and read 5692 times:
Quoting Kappel (Reply 1): It has nothing to do with the age of the aircraft.
It might have something to do with it, but maybe not in the way he means.
In a lot of older aircraft, various interior panels are just a little bit loose, and they will vibrate during cruise if the frequency of the sound from the engines matches their harmonics. The vibration can often be more violent than you'd expect - I've found panels that were vibrating with my hand, and they were vibrating so hard that I couldn't stop them by pressing down.
In an older plane (or at least a plane with an older interior), you can have a dozen panels vibrating in various parts of the cabin and giving off noise, and it can sound like a pretty terrible racket. It's especially true in the back of the plane where it's louder anyway and you can't easily tell that the sound isn't all coming from outside.
Also, that plane does have RR engines - I'm not sure how loud they are compared to PW or GE engines, but that might account for some of the difference if you're used to the other ones.
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Viscount724 From Switzerland, joined Oct 2006, 28694 posts, RR: 24
Reply 3, posted (7 years 4 months 1 day 17 hours ago) and read 5684 times:
The last few rows on all jets are the noisiest. However I have never thought that 747s were notably loud at the rear. It's also possible that some of the noise could have been due to faulty seals in the rear cabin doors. I've flown on quite a few aircraft where the areas near the doors are very noisy due to poor door seals which causes air to escape with resulting noise.
AA737-823 From United States of America, joined Mar 2000, 6247 posts, RR: 9
Reply 4, posted (7 years 4 months 1 day 16 hours ago) and read 5578 times:
Quoting Spacecadet (Reply 2): Also, that plane does have RR engines - I'm not sure how loud they are compared to PW or GE engines, but that might account for some of the difference if you're used to the other ones.
I work outside at the busiest 747 airport in the US. I don't know about INSIDE the cabin, as all I've flown on are PW and GE powered, but from outside, RR is DEFINITELY loudest of the three,
ImperialEagle From United States of America, joined Jan 2006, 2630 posts, RR: 19
Reply 6, posted (7 years 4 months 1 day 11 hours ago) and read 5506 times:
Quoting Kappel (Reply 1): It's because you were sitting in the back, even the a340 is loud in the back. If you sit above or in front of the wings the next time, you'll notice a big difference. It has nothing to do with the age of the aircraft.
A heavy aircraft with powerful engines is producing some serious thrust to remain at altitude. A seat behind the wing is a good place to experience this issue. The rear of a maxed-out 764 comes to mind. It'll wear you out on a long flight. At the very least get some foam earplugs as it helps reduce the noise fatigue a lot.
"If everything seems under control, you're just not going fast enough!"