Audiometry 3

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Audiometry 3

Post  meodingu on Wed Sep 29, 2010 1:54 pm


Learning effect - the first ear tested sometimes appears worse than the second one since the individual becomes more proficient at detecting the threshold.

Headphone fit - some of the variation in threshold measurement has been attributed to differences in the location of the headphones, which in turn affect the detection of the threshold.

Background noise – audiometric tests should be carried out in a sound-proof chamber to eliminate external sounds from influencing the test.

A further complication of audiometric testing is that it is subjective and relies on the cooperation of the subject. If the subject is unable or unwilling to co-operate with the test then unrepresentative results will be obtained.

The technique described above enables a comparison the threshold of hearing of the individual undergoing audiometry with a reference value at a range of octave band frequencies (125, 250, 500, 1000, 2000, 4000, 8000 Hz). From this data a pictorial representation, an audiogram, of hearing loss at various frequencies is produced.



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