Dohm® Natural Sound MachineBeloved by generations since 1962, the Dohm is the original white noise machine. The Dohm model features the signature fan based natural white noise producing the famous Marpac Sound the soothing ambient sounds of rushing air, without the disturbance of actual moving air or other irritations. With two speed options for adjustable tone and volume, the Dohm makes it simple to create a personalized sound environment, excellently masking background sounds