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.
Hearing loss may be greater at some frequencies than others, or all frequencies may be equally affected. Conductive hearing loss is a result of damage to the outer or middle ear, whereas sensorineural hearing loss results from damage to the cochlea or auditory nerve.