Does the Purest Sleep Diffuser have a white noise option? January 23, 2019 18:52 Updated No, the Purest is a sleep scent diffuser only. Related articles How does the sound of the Uno compare to the Dohm Classic? Can you control the intensity of the scent in the Purest Diffuser? How large of an area does the Purest Sleep Diffuser cover? What are the mattress weight and dimensions for Yogabed and Unplug? What is “pink noise”?