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How Quiet Are The 787 And 747-8 From The Outside?  
User currently onlineA380900 From France, joined Dec 2003, 1106 posts, RR: 1
Posted (4 years 1 month 3 weeks 3 days 19 hours ago) and read 9135 times:

With the new engine technology, are they as strikingly quiet from the outside as the A380 sounded? Is it stunning? Will they be as quiet from the inside?

[Edited 2010-06-07 22:21:12]

8 replies: All unread, jump to last
 
User currently offlineStitch From United States of America, joined Jul 2005, 30623 posts, RR: 84
Reply 1, posted (4 years 1 month 3 weeks 3 days 10 hours ago) and read 8573 times:
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I had a 787 (ZA001) fly directly overhead at under 1000m and it was amazingly quiet. An A320 about a kilometer north and maybe 3000m up flew by a moment later and it was significantly louder.

The 787 also has a very unique noise signature. Even before she came into view, I was expecting a 787 because it sounded like no other airplane I'd ever heard.

As for the 747-8, based on the videos I have heard of her landing overhead, she seems noticeably quieter.


User currently onlinenra-3b From United States of America, joined Oct 2000, 165 posts, RR: 0
Reply 2, posted (4 years 1 month 3 weeks 3 days 8 hours ago) and read 8251 times:

I had the opportunity to experience the take off sounds of both the 787 and 747-8 at Boeing Field a few months back. (Mid-field near the runway) Both were extremely quiet in my perception. In fact, the traffic on the road behind me seemed louder..... Just my opinion, of course. 

Cheers,
Bob


User currently offlineBMI727 From United States of America, joined Feb 2009, 15719 posts, RR: 26
Reply 3, posted (4 years 1 month 3 weeks 3 days 8 hours ago) and read 8160 times:

Quoting Stitch (Reply 1):
The 787 also has a very unique noise signature. Even before she came into view, I was expecting a 787 because it sounded like no other airplane I'd ever heard.

It should have more of the buzzsaw sound and less of a roar, probably.



Why do Aerospace Engineering students have to turn things in on time?
User currently offlineStitch From United States of America, joined Jul 2005, 30623 posts, RR: 84
Reply 4, posted (4 years 1 month 3 weeks 3 days 7 hours ago) and read 8066 times:
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Quoting BMI727 (Reply 3):
It should have more of the buzzsaw sound and less of a roar, probably.

Exactly.


User currently offlineLY4XELD From United States of America, joined Mar 2000, 857 posts, RR: 15
Reply 5, posted (4 years 1 month 3 weeks 3 days 3 hours ago) and read 6724 times:

Quoting BMI727 (Reply 3):
It should have more of the buzzsaw sound and less of a roar, probably.

I find it has more of a howl than anything. I haven't noticed any buzzsaw (a la 757), it sounds like a more quiet version of the 777.



That's why we're here.
User currently offlineairplanenut From United States of America, joined Sep 2001, 654 posts, RR: 0
Reply 6, posted (4 years 1 month 3 weeks 3 days 2 hours ago) and read 6344 times:

Someone asked me this after the first flight of the 787, when I was standing alongside the runway. It occurred to me when asked that I didn't even think about how quiet it was at the time, because it wasn't anything like the roar I'm used to. So yes, much quieter.


Why yes, in fact, I am a rocket scientist...
User currently offlineAeroflot001 From Argentina, joined Oct 2009, 400 posts, RR: 0
Reply 7, posted (4 years 1 month 3 weeks 3 days 2 hours ago) and read 6074 times:

I know many have had the pleasure of hearing how quiet it is from the outside. I cant wait until the inside videos start pouring onto youtube.

Will it the 787 and 747-8 be quieter than the A380 both inside and out. It is amazing how quiet the A380 is on the inside and the outside as well.


User currently offlineDrewski2112 From United States of America, joined Aug 2006, 119 posts, RR: 0
Reply 8, posted (4 years 1 month 3 weeks 2 days 8 hours ago) and read 3315 times:

Both are creepy quiet. The 747-8F is more shockingly so as it's such a large airplane. I can carry on a conversation at normal volumes as either plane rotates 110 meters away. I can't do that with a 737NG or a G-V.

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