I feel hearing loss recently, what are the necessary tests?

      The purpose of the external ear examination is to check whether the external ear canal is blocked by foreign bodies, damage, or bacterial infection.Because the external auditory canal is not a straight line, but slightly curved in an S shape.Therefore, when inspecting the external auditory canal, it is necessary to stretch the auricle and tragus to straighten the external auditory canal so that the deep part of the external auditory canal and the tympanic membrane can be seen clearly.

      Before the test starts, the subject will enter the test room with good sound insulation effect, wear the test earphone, hold a button in hand, and press it to show that it hears a sound during the test.The subject will measure the hearing threshold (the lowest decibel reading that can hear the smallest sound) in different audio frequencies, and draw a pure tone audiometry chart.The normal pure tone audiometry chart should fluctuate between 0-25 decibels in the soundproof frequency band. If it is in a certain audio frequency          There was a sudden drop, proving that the subject had difficulty hearing at this frequency.

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REF: Hearing amplifierHearing LossHearing Aids Types
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