Audiometry

n. measurement of hearing using an audiometer

Audiometry is the testing of hearing ability. Typically, audiometric tests determine a subject's hearing levels with the help of an audiometer, but may also measure ability to discriminate between different sound intensities, recognize pitch, or distinguish speech from background noise.  Acoustic reflex and otoacoustic emissions may also be measured. Results of audiometric tests are used to diagnose hearing loss or diseases of the ear.
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Audiometry is the testing of a person's ability to hear various sound frequencies. [more]Audiometry - Community and Resources

Noun
1. the measurement of hearing
(synonym) audiology
(hypernym) otology, otolaryngology
2. measuring sensitivity of hearing
(hypernym) measurement, measuring, measure, mensuration

The measurement of hearing.