Final answer:
Tympanometry is the procedure used to measure middle ear compliance and pressure, which helps in assessing the function of the middle ear and the Eustachian tube.
Step-by-step explanation:
The measurements that reflect the middle ear compliance and pressure along with the volume of the external auditory canal are typically obtained through a procedure called tympanometry. Tympanometry is an objective test of middle-ear function that measures the movement or compliance of the eardrum (tympanic membrane) in response to changes in air pressure. This test can give information about the presence of fluid in the middle ear, mobility of the eardrum and the ossicles (malleus, incus, and stapes), and function of the Eustachian tube.
During the test, a probe is inserted into the ear canal, which changes the air pressure within and generates a tone. The way the ear drum moves in response to these changes is recorded and can be used to detect problems such as Eustachian tube dysfunction or middle ear effusion.