trompe d'Eustache {feminine}
The middle ear is an irregular cavity filled with air and which communicates with the nasopharinx by the Eustachian tube.
The Eustachian tube also called the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear, of which it is also a ...
La trompe d'Eustache s'ouvre alors permettant un équilibre de la pression. That opens the Eustachian tube and enables a balance of pressure.