Authoritarian regimes are also sometimes subcategorized by whether they are personalistic or populist. Personalistic authoritarian regimes are characterized by arbitrary rule and authority exercised mainly through patronage networks and coercion rather than through institutitions and formal rules..
Fluid accumulation is the most common cause of conductive hearing loss in the middle ear, especially in children. Major causes are ear infections or conditions that block the eustachian tube, such as allergies or tumors.
Therefore, tinnitus is common and in most, but not all, cases it is associated with some degree of hearing loss. The most common causes of tinnitus are damage to the high frequency hearing by exposure to loud noise or elevated levels of common drugs that can be toxic to the inner ear in high doses. For example, after you have been to a loud rock concert you may experience tinnitus for a while in association with dulling of hearing.