Is the Boeing 787-9 quiet?

The Boeing 787 Dreamliner is a little quieter than the A350, and has a reputation of having one of the best cabin environments in the industry. The Dreamliner's lightweight composite structure contributes to reduced noise levels, both inside and outside the aircraft.



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The Dreamliner's lightweight composite structure contributes to reduced noise levels, both inside and outside the aircraft. The use of advanced soundproofing materials and quieter engines keeps the cabin environment more tranquil for passengers.

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Onboard Ambience: Five Airliners That Are Known For Their Quiet Cabins
  1. 1 Airbus A380.
  2. 2 Boeing 787 Dreamliner. ...
  3. 3 Airbus A350. ...
  4. 4 Embraer E-Jets E2. ...
  5. 5 Airbus A220. The Airbus A220, formerly known as the Bombardier CSeries, is the quietest aircraft in its class by 50 dBA. ...


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The loudest aircraft still in commercial service in any significant numbers is the Boeing 727. The 727 is banned from most major airports due to its noise levels. Among aircraft permitted worldwide, the Boeing 747–400 is noticeably louder than other widebody aircraft such as 777, A380 and A350.

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Its exit limit is set at 420. Despite not flying commercially until three years after the original 787-8, this version has since overtaken it in terms of popularity. This is presumably thanks, in part, to boasting the best range of any Dreamliner. Indeed, the 787-9 can operate flights up to 14,140 km (7,635 NM) long.

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It has been reported that the A350 is quieter than the B787, primarily due to the automatic Noise Abatement Departure Procedure (NADP) for the optimization of the engine thrust and flight path to reduce noise and the fuel-efficient engine. The other giant airplane, A380, is also known to have a quiet cabin.

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This advanced fly-by-wire system also is the key to Smoother Ride Technology – unique to the 787 family -- which senses turbulence and adjusts control surfaces automatically to dampen its effects before it reaches the passengers.

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The 787-8 Dreamliner can fly 242 passengers up to 7,350 nautical miles (13,620 km) in a typical two-class configuration. The 787-9, a stretch of the 787-8, can fly 290 passengers 7,635 nautical miles (14,140 km) in addition to more cargo, allowing airlines the ability to grow routes first opened by the 787-8.

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The sound comes from the rotary hydraulic motor situated in the wheel well of the jet which turns the drive shaft for the flap drive screw jacks.

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The noise is caused by a hydraulic pump which is situated directly below the cabin. It mostly runs on takeoff and landing, but it can also run automatically at other times. Dogs have been reported to need psychiatric treatment after being transported on a 787.

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The Boeing 777 series is larger than the 787 and thus can carry more passengers. The 787-10 has a higher capacity than the smaller 777-200 series. However, it falls short of the larger 777-300 models by 66 passengers in a typical two-class configuration. Of course, the exact capacity varies from airline to airline.

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To start the Boeing 777 vs 787 comparison, we must say that the 787 is a more fuel efficient aircraft than the 777 thanks to its use of composite wings and more aerodynamically efficient design. The 777 has a fuel consumption of 9 miles per gallon, while the 787 has a fuel efficiency of 11 miles per gallon.

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United Airlines has ordered another 50 787-9s plus 50 options making the airline the largest operator of the aircraft.

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The FAA said the leaks could damage critical equipment and lead to a “loss of continued safe flight and landing.” The agency said one airline found wet carpet in the cockpit of a plane and, when it inspected its entire fleet of 787s, found “multiple” planes with leaking faucets.

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The A350 offers the ultimate passenger experience even on the longest of flights. Its innovative design delivers a true feeling of spaciousness, with wide seats, high ceilings and alluring ambient lighting.

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The Airbus A321 study suggests that noise levels are higher in the rear of the cabin, near and behind the engines and propellers, and near windows. When you have a choice, moving to other locations in the cabin may reduce your noise levels.

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Over the past 50 years, aircraft have reduced their noise output by 75% and this progress continues. Today's aircraft entering service have on average, a noise footprint that is 30-50% that of the aircraft they are replacing thanks to new engine and airframe design and technology.

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