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Speaking Deaf Babies.

Diagnosing Hearing Loss – A Summary

A. Tests for children aged 6 months or above:

Outer Ear Tests

These tests give information about at what decibel level and at which frequency the baby is able to hear, and whether there is any problem with the outer ear or the middle ear.

i. Pure Tone Audiometry
ii. Bone Conduction Audiometry

Middle Ear Tests

Impedance audiometry is a method to test the resistance of the middle ear to allow the sound to pass through to the inner ear. It is done placing a probe till the ear canal.

Tympanogram helps in knowing the presence of any fluid or pressure in the middle ear or any hole in the ear drum.
Middle Ear Muscle Reflex (MEMR) helps in recording the responses to loud sounds.

B. Tests for children of 6 months and below:

Inner Ear Test:

i. Oto Acoustic Emissions (OAE)

ii. Auditory Brainstem Response (ABR) or Brain Auditory Evoked Response (BAER) or Brainstem Evoked Response Audiometry (BERA)