If you want some noise without the fan you can get phone apps to play white noise. I use one called “sleep sounds” which lets you mix different types of sounds to make something you like - I use natural sounds which includes things like running water, rain and wind sounds as well as things like frog and bird noises if you want. You can also do things like train or city noises. You can mix in different things and vary the volume of different components to get something you like. It’s free to use (a small cost if you want to remove ads).