Author Topic: Sitting in front of the engine louder than vice-versa (on takeoff)?  (Read 3393 times)

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Offline EmadIV

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Hello everyone, it's my first post here :) and I'm glad to be part of the Aviation Forum now. I've posted this on other forums but it didn't gain enough attention.
Many say commercial widebodies such as the Boeing 777 or 747 'get louder as you go behind the engines'. Most videos on YouTube prove otherwise-on takeoff you can hardly notice any engine noise when you sit near the back. Examples:
BA 777 Takeoff DFW 17R
Lufthansa Boeing 747 take-off from Newark Liberty Airport
A330 takeoff from Kangerlussuaq (BGSF), Greenland
Pretty quiet, no?
Well, what will happen if the viewpoint changes to 'in front of the engines'?
777 Boeing AA Takeoff take off- SPEAKERS ON MAX - LAX to LHR - THE BEST
Boeing 747 takeoff from San Francisco International (747)
airberlin A330-300 *D-AERK* Takeoff AT D├╝sseldorf Airport (HD) (A330)
A lot louder, isn't it? Not just 'louder', a great deal of a difference is noted.
A simple google search shows many topics in forums proving the opposite. In fact, I haven't found a single post yet that says it's quieter from the back. From my experience and knowledge you hear the rather loud engine 'whine' from the front as well. This doesn't apply to airliners like the MD-80 where the engines are mounted near the back, it can get very loud back there.
Any ideas? I'm very confused  ??? !
Thank you!

Offline Macca

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #1 on: August 29, 2011, 09:19:14 AM »
There are a lot of variables but as a general rule the front is quieter. This would however depend on any inbuilt noise cancelling system the aircraft has actually working. Most of those film clips are taken from immediately behind or in front of the engine and are not far enough away to offer a true comparison.
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Offline Rod

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #2 on: August 30, 2011, 12:40:04 AM »
A few babies screaming in the rows behind drown out all engine noise.
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Offline EmadIV

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #3 on: August 30, 2011, 06:02:22 AM »
There are a lot of variables but as a general rule the front is quieter.
Thank you for the reply. I posted this topic because I already had a theory for why it would be loud from the front. It may be louder from the back but it definitely is loud (just as in the videos I've posted). I've been traveling in business class for the past 2/3 years and it's not 'quiet' at all from the front, in the RR-powered aircraft you would hear the loud 'buzzsaw' from the front.

This is why the MD-80 is loud from the back; you're sitting right ahead of the engine intake. Therefore you listen to the fan rotating at high RPMs and the motors that rotate it, creating the engine whine. It can't be any different in the Boeings/Airbuses. Therefore sitting ahead of the engine is not quiet. Is it even louder from the back?

Offline Bravo Brad

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #4 on: August 30, 2011, 12:49:08 PM »
It does raise the question, as to what is louder outside the aircraft. 

Maybe Robk should conduct an experiment and stick his head two meters behind the engine, and then SP could stand two meters infront of it.

Does anybody have a video camera?
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Offline EmadIV

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #5 on: August 30, 2011, 12:57:46 PM »
I have an old 360p one that wouldn't suffice. What's weird is that some friends of mine said they experienced both and it was a lot quieter from the back.

Offline Bravo Brad

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #6 on: August 30, 2011, 05:26:35 PM »
My bet is that SP won't here rob, but rob will hear various noises from SP. therefore it is quieter at the rear
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Offline RobK

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #7 on: August 31, 2011, 07:09:06 PM »
Yeah.  Noise.  From considerable personal experience it's noisier at the back than the front... and that's the same for jet aircraft too.

Offline EmadIV

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #8 on: September 03, 2011, 07:11:26 AM »
Would it be silly of me if I were to choose a seat near the back on my next flight to hear the difference? I'm pretty sure I'll be on an A330 next.

Offline Cecil

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #9 on: September 04, 2011, 01:32:01 PM »
Would it be silly of me if I were to choose a seat near the back on my next flight to hear the difference? I'm pretty sure I'll be on an A330 next.
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Offline RobK

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Re: Sitting in front of the engine louder than vice-versa (on takeoff)?
« Reply #10 on: September 07, 2011, 06:26:18 AM »
I don't know.  Personally, I wouldn't pursue this issue and sit in first class.  :icon_mrgreen: