Global Adult Hearing Aids Market By Type (Behind-The-Ear(Bte) Hearing Aids, In-The-Ear(Ite) Hearing Aids, In-The-Canal(Itc) Hearing Aids, And Completely-In-Canal(Cic) Hearing Aids), By Application (Congenital Hearing Loss, Age-Related Hearing Loss, And Acquired Trauma Hearing Loss), By Region And Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends And Forecast 2019-2028