JAAlbert From United States of America, joined Jan 2006, 1192 posts, RR: 1 Posted (5 years 3 months 3 weeks 3 days 9 hours ago) and read 5770 times:
The A-380 is winning praise from passengers and crew for its quiet cabin. I've personally found the muffled roar from engines wearying on very long flights. Will the 787 and 748 match the noise levels of the 380 and usher in a new standard in cabin noise levels? Or, as one a-netter reported, does Boeing's emphasis lie elsewhere in designing its new jets?
Pianos101 From United States of America, joined Jan 2008, 357 posts, RR: 0 Reply 1, posted (5 years 3 months 3 weeks 3 days 7 hours ago) and read 5598 times:
The main reason that the a380 is so quite inside is because since it is so massive the engines are much farther away from the cabin. Also, engine technological advances do play a big role; this is why the a380 is also very quiet when heard from the ground taking off.
The engines used on the 87 and 47-8 will also use similar noise-reduction technologies thus reducing noise inside and outside the cabin. However, since the 87 is still much smaller than the a380 and 47, the engines will be closer to the cabin and probably be "perceived" as being louder....
DistantHorizon From Portugal, joined Oct 2005, 224 posts, RR: 0 Reply 2, posted (5 years 3 months 3 weeks 3 days 7 hours ago) and read 5553 times:
Quoting Pianos101 (Reply 1): The main reason that the a380 is so quite inside is because since it is so massive the engines are much farther away from the cabin.
No.
A few meters difference in engines distance makes no noticeable diference in decibels. At all.
The 787 has thinner walls than the A380 does. And yes, as a result, it will be louder inside. Just do not know yet how much...
Astuteman From United Kingdom, joined Jan 2005, 9137 posts, RR: 96 Reply 3, posted (5 years 3 months 3 weeks 3 days 7 hours ago) and read 5467 times:
Quoting DistantHorizon (Reply 2): The 787 has thinner walls than the A380 does. And yes, as a result, it will be louder inside. Just do not know yet how much...
Most everything has thinner walls than the A380
The 787 and 748i should be quiet airplanes inside.
(BA did say one of the factors favouring the A380 over the 748i was lower noise, but I presume this to mean externally).
Will they be as quiet as the A380? Don't know.
Will they be near enough that it won't matter?
Probably.
Will they be quieter than a 777?
Undoubtedly
RayChuang From United States of America, joined Jun 2000, 7695 posts, RR: 5 Reply 4, posted (5 years 3 months 3 weeks 3 days 6 hours ago) and read 5426 times:
The A380-800 should technically be quieter than the 747 because the Trent 970 or GP7270 engines used on this plane turns the front fan at a lower speed than what you get on the 747-400 engines, which means less noise generation overall.
Comparing the inside and outside dimensions of the A350 and the B787, it seems that the B787 has significantly thinner walls than the A350 as well. Should we expect the A350 to be significantly quieter on the inside than the 787?
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