Tuning forks to audiometers and back again.
D001299:Audiometry / Q000266:history* / Q000295:instrumentation / Q000592:standards; D001844:Bone Conduction / Q000266:history*; D006320:Hearing Tests / Q000266:history*; D049669:History, 16th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans