What key feature does the Boeing 787 Dreamliner employ for passenger comfort?

The Boeing 787 Dreamliner is designed with a lower cabin altitude pressure, which significantly enhances passenger comfort during flight. Specifically, the cabin altitude is set to approximately 6,500 feet rather than the more traditional 8,000 feet used in many older aircraft. This lower altitude can lead to a reduction in passenger fatigue and discomfort, as it has been shown to help mitigate the effects of altitude on the human body. At a lower cabin altitude, the oxygen levels are comparatively higher, leading to a more comfortable environment, particularly on longer flights.

While the other features like seating and soundproofing can contribute to comfort in their own ways, the innovative approach of lowering cabin altitude directly addresses the physiological effects of flying and plays a significant role in enhancing the overall passenger experience on the 787. Overall, the engineering choices made for the Dreamliner focus on creating a healthier and more enjoyable in-flight atmosphere, making this feature particularly impactful.