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audiometry
Audiometry (from (ラテン語:audīre), "to hear" and ''metria'', “to measure") is a branch of Audiology and the science of measuring hearing acuity for variations in sound intensity and pitch and for tonal purity, involving thresholds and differing frequencies. 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, and often make use of an audiogram.
==History and development==
The basic requirements of the field were to be able to produce a repeating sound, some way to attentuate the amplitude, a way to transmit the sound to the subject, and a means to record and interpret the subject's responses to the test.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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