Cockpit noise levels
Is anyone in a position to provide a noise fiqure, in dB for a classic B737 flight deck. Google and PPrune search etc provide lots of generic info on acceptable and non-acceptable levels, but I can not find anything specific to aircraft types.
Trying to do a bit of research prior to buying a headset and any info would be helpful. |
Noise measurement in the cockpits of various aircraft using a hand held Radio Shack Digital-display Sound-level Meter produced interesting results. Boeing 737-300/400 aircraft registered 84-86 dBA in normal cruise flight at FL 270-290 (27000-29000 feet).
I searched google on "noise level" 737 cockpit and the above quote was taken from the first hit from this website. |
If you get one of those fancy db meters you'll notice that the noise level goes up exponentially above 300 knots on a 737-800.
The same goes for approaching 82 mach. This is not a drawback IMO. I like an airplane that talks to you! 757 767 don't really talk to you at those speeds, so an overspeed can really sneak up on you with little warning. |
There are a lot of things you might be more concerned about that you can hear that don't have a horn to warn you about like overspeed.
Boeing is working on a fix that I hear puts the flight deck noise around 72 dBa. ;) |
The 757 is very well designed in regard to skin (wind) noise, but to make up for low levels of that kind of noise they invented the aircondition ducts from hell (almost as noisy as the average US home a/c system). There must have been a deaf man designing this apparatus! Very sad.
:sad: |
noise
Once you lose 50% of your hearing, cockpit noise won't be a problem for you any more. What ???
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Boeing 737-300/400 aircraft registered 84-86 dBA in normal cruise flight |
I like an airplane that talks to you! 757 767 don't really talk to you at those speeds, so an overspeed can really sneak up on you with little warning. |
From tests I did with a DoT observer in the open front cockpit of an early model Pitts S-2A in 1980 - 126 dB in a climb, peak of 130 in aerobatics.
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