Lufthansa, Cathay Pacific and Qatar Airways A350s are all super quiet and cruise around 65-68 dB in the front of the plane. I think the A350s, 787s on any Middle Eastern or Western carrier would all be about the same. I'd probably avoid any of the SE Asian and African carrier, with Singapore and EVA Air being exceptions.Thanks for your great input.
So your recommendation is A350-900 from Lufthansa and the 787-9 @ 70 dB.
These are max acceptable levels with double hearing protection on.
May I ask which airline was the Dreamliner 787-9?
It does seem that maintenance seems to play a huge role. If an engine isn't tuned to tight specs, it will make more noise.
That is unfortunate to hear an A380 Jumbojet at 80 dB, that's nonsense when the advertised noise level should be sub 60 dB.
The 787-9 that I flew was United Airlines and it was a very new plane, less than two years old. It was extremely quiet (70 dB at cruise).
In fairness, the A380 that I flew was very old. One of the oldest in Singapore Airlines fleet, so that could have been the problem. If they ever return to the skies, I'm going to fly Etihad A380 and will report back.