The origin of impedance audiometry.
Impedance audiometry is performed every day in nearly every ENT department, office and, audiology clinic all over the world. But hardly anyone occupied with these measurements has any idea of the origin of this Danish contribution to otolaryngology.
D000158:Acoustic Impedance Tests / Q000266:history*; D003718:Denmark; D049673:History, 20th Century; D006801:Humans