Which method assesses the energy that bounces back from the eardrum to help evaluate the middle ear?

Which method assesses the energy that bounces back from the eardrum to help evaluate the middle ear?

• A. Acoustic reflectometry
• B. Tympanometry
• C. Weber test
• D. Rinne test

Answer: (A)

Assessing how much sound energy bounces back from the eardrum is about measuring energy reflectance of the middle ear. Acoustic reflectometry does exactly this: it sends a brief sound into the ear and records the portion that is reflected back by the tympanic membrane. The level of reflected energy changes with the condition of the middle ear (for example, fluid behind the eardrum or a stiffened membrane), so this method provides a direct look at middle-ear status through bounce-back energy. Tympanometry, while also evaluating middle-ear function, does so by changing air pressure and seeing how the eardrum moves, which reflects membrane compliance rather than the energy that bounces back. The Weber and Rinne tests are hearing tests using tuning forks to assess conduction and lateralization, not the energy reflectance of the tympanic membrane.

Assessing how much sound energy bounces back from the eardrum is about measuring energy reflectance of the middle ear. Acoustic reflectometry does exactly this: it sends a brief sound into the ear and records the portion that is reflected back by the tympanic membrane. The level of reflected energy changes with the condition of the middle ear (for example, fluid behind the eardrum or a stiffened membrane), so this method provides a direct look at middle-ear status through bounce-back energy.

Tympanometry, while also evaluating middle-ear function, does so by changing air pressure and seeing how the eardrum moves, which reflects membrane compliance rather than the energy that bounces back. The Weber and Rinne tests are hearing tests using tuning forks to assess conduction and lateralization, not the energy reflectance of the tympanic membrane.