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I use an eye mask with built in Bluetooth headphones to sleep. My favorite sound is the airplane propeller drone. It reminds me of flying as a kid and falling asleep next to my mother in the dimly lit cabin. My daughter with autism listens to ASMR to sleep. We have a YouTube subscription. I also have a subscription to FocusAtWill.com which has an excellent collection of curated sounds. I love this track too: 432 Deep Healing For your door, you can apply egg crate foam.