You may believe you are aware of the essential facts regarding sleep apnea, but there are many facets of sleep apnea of which most people are unaware. For example, did you know that there are two different types of sleep apnea? Obstructive is type of sleep apnea which is familiar to most people, as this is caused by airway blockage, characterized by snoring and the cessation of breathing for 10 to 20 seconds.