Audiometry

Audiometry

The audiogram is an evaluation of how well an individual can hear. Sounds are presented to the individual through earphones during the test. These sounds are presented at different levels of frequency and intensity. The human ear responds to the frequency or pitch of a sound and the intensity or loudness of the sound. The frequency of the sound is measured in Hertz (Hz), and the loudness of the sound is measured in decibels (dB). During the procedure, the responses of the individual are recorded on a graph. An individual has no impairment in hearing if he or she detects the sound that is presented through the earphones in the range of 0 to 25 decibels. The audiogram indicates how much louder (in decibels) the pure tone frequency must be for the tested subject to hear it compared to what the normal, general population needs to hear it.

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