Checkout Ambient Mixer

I saw a post about Ambient Mixer on Epbot.com (one of my favorite blogs). It is a great site that has audio you can listen to, it is more than white noise but not music, ambient audioscapes. There are many categories to checkout, environmental, movies, unreal, etc.

When you pick one and go into it, for example221b Baker Street, a Sherlock themed one, you can customize the sounds if you want.

They are nice to listen to as background noise or play when you are meditating. There are several rooms that could inspire writing. If you are writing a story set on a pirate or space ship, there is one that sounds like you are on them.
Oh and there are bunch of Harry Potter themed ones, one for each common room.
Or  you could make your own set of sounds for free.
I really like The Alien Sounds of the Darkest Ocean Depths.

Go check it out and enjoy. http://www.ambient-mixer.com/