Pink noise is a type of sound signal characterized by a balanced distribution of energy across frequencies, making it sound smoother and more natural compared to white noise. Unlike white noise, which has equal power across all frequencies and can sound harsh, pink noise decreases in intensity as frequencies increase. This results in a deeper and more soothing tone, similar to the gentle rustling of leaves, ocean waves, or steady rainfall.

Pink noise is often used in sound therapy, sleep aids, and focus improvement because of its calming properties. It helps mask background noises, making it easier to concentrate or fall asleep. Researchers also study pink noise for its potential to enhance memory and promote deeper sleep, as it aligns well with the natural rhythms of the brain.