The origin of aural instruments.
D004427:Ear Diseases / Q000175:diagnosis; D005060:Europe; D005064:Eustachian Tube; D006310:Hearing Aids / Q000266:history; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008416:Mastoid; D010036:Otolaryngology / Q000266:history / Q000295:instrumentation*; D013525:Surgical Instruments / Q000266:history; D014432:Tympanic Membrane; D014481:United States