The nose and ears are connected.
Inhaled airflow, through the anterior nostril through the nasal cavity into the nasopharynx, in the nasopharynx there is a tube-type structure can be communicated with the middle ear, called the Eustachian tube.
The Eustachian tube is a tube that communicates between the tympanic chamber and the nasopharynx. In adults, the Eustachian tube is about 35mm long and consists of a bony and cartilaginous portion, with the opening in the nasopharynx being the pharyngeal port of the Eustachian tube, and the opening in the middle ear cavity being the tympanic chamber port of the Eustachian tube.
When opening the mouth, swallowing, yawning, singing, the pharyngeal opening of the Eustachian tube opens to regulate the air pressure in the tympanic chamber, thus maintaining the balance of pressure inside and outside the tympanic membrane. The direction of cilia movement on the mucosal surface of the Eustachian tube is toward the nasopharynx, which enables the secretions in the tympanic chamber to be discharged; and because the mucosa of the cartilaginous part of the cartilage is fold-like, with the role of a living flap, which prevents pharyngeal fluids from entering the tympanic chamber.
The nose is connected to the ear through the Eustachian tube.