In the context of hearing tests, what does the term "impedance" refer to?

The term "impedance" in the context of hearing tests specifically refers to the resistance to sound transmission in the middle ear. When assessing hearing, particularly during tympanometry, the measurement of impedance helps to evaluate how well sound can pass through the middle ear structures. High impedance may indicate issues such as fluid behind the eardrum or a problem with the ossicles, which can impair sound conduction.

Understanding impedance is critical for audiologists and hearing dispensers because it provides insights into the functioning of the middle ear and helps in diagnosing various auditory conditions. The evaluation of impedance can determine how effectively sound is transmitted to the inner ear, which is essential for accurate hearing assessments.