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1. Headphones
A baby cries a few rows down. A person next to you snores abruptly. The friends behind you laugh loudly. We’re all human, and packing many people into an airplane means it’s bound to be noisy. Pack headphones to drown out the noise; noise-canceling headphones will also quiet the hum of the airplane. Plus, you don’t want to be that person watching a movie with the sound on, disrupting everyone around you.