HEARING TEST
Hearing tests done at corti
PTA
Pure-tone audiometry is the main hearing test used to identify hearing threshold levels of an
individual, enabling determination of the degree, type and configuration of a hearing loss and
thus providing a basis for diagnosis and management.
OAE
Otoacoustic Emissions Hearing tests are usually performed on newborn babies to detect deafness.2
The test can also partially estimate hearing sensitivity and test for functional hearing loss.
Functional hearing loss is also sometimes referred to as non-organic hearing loss and is a
condition where you have symptoms or behaviors of hearing loss but there is nothing actually
wrong with your hearing.
BERA
The brainstem evoked response audiometry (BERA) is an objective neurophysiological method for
the evaluation of the hearing threshold and diagnosing retrocochlear lesions.The auditory
brainstem response (ABR) test tells us how the inner ear, called the cochlea, and the brain
pathways for hearing are working. You may also hear it called an auditory evoked potential
(AEP). The test is used with children or others who cannot complete a typical hearing screening.
VEMP
is a relatively new vestibular function test performed by stimulating one ear with repetitive
pulse or click sound stimulation and then measuring surface EMG responses over selected muscles
averaging the reaction of the muscle electrical activity associated with each sound click or
pulse.
ECochG
Electrocochleography (ECochG) is a measurement of stimulus-related electrical potentials, which
include the cochlear micro phonics (CM), summating potentials (SP), and compound action
potentials (AP) of the auditory nerve. This is an ideal test for the diagnosis of Meniere's
disease
IMP
Impedance or immitance audiometry or Tympanometry is an objective test and the results of the
test help in the understanding of the following parameters:
- The status of the eardrum and the middle ear.
- Functioning of the reflex pathways of hearing, involving the facial nerve, vestibulocochlear
nerve and the auditory brainstem.
- The three tiny bones of the middle ear.
- Eustachian tube function.
- The two muscles of the middle ear – tensor tympani and the stapedius muscle.
- Functioning of the cochlea.
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