Typanometry is an objective test of middle ear function. It measures the ability of the eardrum and middle ear bones to move in response to sound. It also gives a reliable estimate of middle ear pressure. In conjunction with other tests, tympanometry is used to diagnose perforated eardrums, ear infections and fixation of the middle ear bones. Acoustic reflex testing can be conducted in conjunction with tympanometry to assess activity of the middle ear muscles in response to sound.
Tympanometry is a quick, painless and reliable measure. Because it requires no patient cooperation, it is equally reliable for children and adults.

Otoacoustic Emissions Testing (OAE) is not an actual "hearing test". OAE tests are very useful measures of hair cell activity in the cochlea or inner ear. The test is done by placing a probe with a soft rubber tip in the ear canal, and presenting a series of tones. The response is recorded by a computer. Because the test is quick AND requires no patient response, OAE is an excellent tool for evaluating children.
OAE is also extremely valuable in measuring changes in inner ear sensitivity. Early signs of "nerve hearing loss" can be detected with OAE long before it is evident with standard audiometry. It is used to monitor patients who are prescribed drugs that may be ototoxic, or who report sudden changes in hearing.