Noise is one of the most persistent issues in aviation. People want to fly, but when it comes to noise, they want to pretend flying doesn’t exist. I’ll be doing multiple episodes on noise abatement in the future, but for starters, in this episode I’m talking noise abatement departure procedures (NADPs): what they are, how they’re flown, and how they’re used to reduce the environmental impact of airliners on noise-sensitive communities.