Cascade Of Water Nature Sounds. Cascade of Water: A constant stream of water, bubbling and running water sounds. A brook or stream with water flowing over rocks and branches. Very good for masking upper-mid and mid-range ringing in the ear sounds. A hypnotic effect, a good sleep aid. A great soothing and relaxing sleep aid. Put on your favorite set of headphones or earbuds, sit back and relax in your recliner or sofa, and let time pass in your state of total relaxation.