TYPES OF HEARING TEST

01. 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 and thus providing a basis for diagnosis and management.

02. Speech Testing

This type of testing is used to measure your speech reception threshold (SRT), or the faintest speech you can understand 50 percent of the time. It is administered in either a quiet or noisy environment and measures your ability to separate speech from background noise.

03. Tympanometry

This test measures the movement of your eardrum in response to air pressure. It can determine if there is a buildup of fluid, wax buildup, eardrum perforations or tumors.

04. Acoustic Reflex Testing

This test measures involuntary muscle contractions of the middle ear and is used to determine the location of your hearing problem (the ossicles, cochlea, auditory nerve, etc.) as well as the type of hearing loss.

05. Auditory Brainstem Response (ABR)

This type of testing is used to determine whether a specific type of hearing loss—sensorineural—exists. It is also frequently used to screen newborns for hearing problems. In an ABR test, electrodes are attached to your head, scalp or earlobes, and you are given headphones to wear. Your brainwave activity is measured in response to sounds of varying intensities.

06. Otoacoustic Emissions (OAEs)

OAEs are sounds generated by the vibrations of the hair cells in the cochlea of your inner ear. This type of testing uses a tiny uses probe fitted with a microphone and speaker to stimulate the cochlea and measure its response. Individuals with normal hearing will produce emissions; when hearing loss exceeds 25-30 decibels, no sound will be produced. This test helps determine whether there is a blockage in the ear canal, excess fluid in the middle ear or damage to the hair cells of the cochlea. OAE testing is often included in newborn hearing screening programs.

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