Listen to Sleep Sounds online. Sleep Sounds is an Unknown language song and is sung by Waterfall Sounds Universe. Sleep Sounds, from the album Flute Music with Ocean - Relaxing Nature Sounds to Calm Down, Calming Water Sounds Collection, Yoga & Meditation, Natural Sleep Aids, Rain Sounds, White Noise for Deep Sleep, was released in the year 2015. The duration of the song is 4:17. Download Unknown songs online from JioSaavn.