What are the best sounds to fall asleep to?

Rico N.
Different for everyone but for me a soothing voice reading me an adult fairytale or folk story like Clarissa Pinkola Estes or a walk through meditation like Bella Ruth Knapperstek.
L Rke W.
I love the sound of the rain. I have an app that has some features that allow me to fall asleep with the sound of the rain or the waves.