How to create a sound barrier?

So in my scene I have a ship with sounds on the upper decks such as flapping canvas, and the lapping waves. However, when the character goes below deck, I want these sounds to fade away and for other sounds like a creaking hull to play. The sounds above deck have a audio range which I like above deck but I want to somehow block them from the lower decks like they would be in real life. Does such a sound barrier exist in unity?

Natively, no sound barrier, but you could setup a primitive trigger for that area that stops the sounds.