Pink noise is a type of sound that contains equal energy across octaves, making it sound deeper and softer than white noise. It has a balanced frequency distribution, which means lower frequencies are more prominent. This characteristic makes pink noise soothing and often used for relaxation and sleep. Many people use pink noise to mask other sounds, helping to create a calming environment. It is commonly found in nature, such as the sound of rain or ocean waves. Some studies suggest that listening to pink noise can improve sleep quality and enhance focus during tasks.