I used to live in Brooklyn about 15-20 minutes from JFK. I used to watch the planes on approach to JFK, much lower than 5000 feet and I didn't hear a thing. They were so low I could tell which airline it was from the tail markings.

The only plane I ever heard was the Concorde... and that made the windows shake.

I was just back there recently sitting in an old favorite restaurant and I immediately started watching the planes come in again.

I really don't think you'll hear them.