10 Hours | Hear one of our most popular sounds, Pink Noise, paired with a more recent sound: Bubbly Spring Creek. Pink Noise is darker and emphasizes lower frequencies than white or brown noise. This creates a strong wall of sound to drown out background noise. Bubbly Spring Creek is the sound of water as it travels through the countryside, washing away Winter and ushering in Spring. It brings life to the flowers and grass, and quenches the thirst of the forest creatures who sneak out from the nearby woods for a few sips. Let the bubbles and churning sound of water rushing over stones calm you as you drift asleep.