[Tubotympanal circulation of air].
D004432:Ear, Middle / Q000502:physiology*; D005064:Eustachian Tube / Q000502:physiology*; D006309:Hearing / Q000502:physiology*; D006320:Hearing Tests; D006801:Humans
EAR, MIDDLE/physiology; EUSTACHIAN TUBE/physiology; HEARING/physiology