Hearing test:

A hearing test provides an evaluation of the sensitivity of a person's
sense of hearing and is most often performed by an audiologist using an
audiometer. An audiometer is used to determine a person's hearing sensitivity
at different frequencies.

 Pure Tone Audiometry

The standard and most common type of hearing test is pure
tone audiometry, which measures the air and bone conduction thresholds for each
ear in a set of 8 standard frequencies from 250 Hz to 8000 Hz.

Pure tone audiometry (PTA) is the key hearing
test used to identify hearing threshold levels of an individual,
enabling determination of the degree, type and configuration of a hearing
loss. Thus, providing the basis for diagnosis and management. PTA is a
subjective, behavioral measurement of hearing threshold, as it relies on
patient response to pure tone stimuli. Therefore, PTA is used on adults and children old enough to
cooperate with the test procedure. As with most clinical tests, calibration of
the test environment, the equipment and the stimuli to ISO standards is needed
before testing proceeds. PTA only measures thresholds, rather than other
aspects of hearing such as sound localization. However, there are benefits
of using PTA over other forms of hearing test, such as click auditory
brainstem response.

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