Some of the most common causes of conductive hearing loss are fluid in the middle ear, with or without infection, and earwax blocking the ear canal. In cases where there is a bacterial infection of the middle ear, antibiotics are often used. Although these conditions often can be diagnosed and treated by a primary care doctor, persistent problems may require the care of an ear specialist. Conductive hearing loss also may be caused by a problem with the bones of the middle ear, which, in many cases, can be treated with surgery.Clear Sound 911 Reviews