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What is a Hearing Test?

Test hearing is a procedure followed in order to evaluate the sensitivity of a person sense of hearing. No child is too young for a hearing test! Infants are now routinely screened for potential hearing loss before they leave the hospital. The type of test used to assess a child’s hearing status depends on the age and cognitive function of the child. Infants are tested in two ways: behaviorally and/or electrophysiologically. For Hearing test online please visit Meenakshi hearing aid centretest hearing

types of hearing aids

Test Hearing for Infants & Young Children

Behavioral observation assessment (BOA)test hearing

BOA testing is conducted by an audiologist specially trained to detect bodily reactions to sound i.e. cessation of activity, body movement, eye widening, eye opening, or change in sucking rate

Visual reinforcement audiometry (VRA)test hearing

As children mature, so does their ability to respond to sound. At approximately six to seven months of age, normally-developing children are able to turn toward a sound source. Children at this level are tested either using earphones or in the sound booth without earphones but using speakers. Sounds used for testing typically include low pitch to high pitch tones that are included in the speech range. Turning toward the sound source is reinforced with a lighted toy. This type of testing is called visual reinforcement audiometry (VRA) and is generally quite accurate in determining hearing levels.test hearing

Conditioned play audiometrytest hearing

By approximately 2 1/2 – 3 years of age most children can be tested using a technique called conditioned play audiometry. Earphones are placed on the child and she/he is conditioned to play various games when the test tone is heard.test hearing

Immittancetest hearing

Acoustic immittance testing evaluates the eardrum and the middle ear space behind the eardrum, as well as a muscle reflex that involves the eardrum and middle ear, the inner ear, the auditory nerve, the auditory brainstem pathways and the facial nerve. Acoustic immittance testing helps to localize what part of the ear may be involved in hearing loss.test hearing

OAE’s

The OAE test is used to find out how well your inner ear, or cochlea, works. It measures otoacoustic emissions, or OAEs. These are sounds given off by the inner ear when responding to a sound. There are hair cells in the inner ear that respond to sound by vibrating. The vibration produces a very quiet sound that echoes back into the middle ear. This sound is the OAE that is measured.test hearing

ABR

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. The ABR is also used if your symptoms might be due to hearing loss in the brain or in a brain pathway.test hearing

ASSR

The auditory steady-state response (ASSR) can be thought of as an electrophysiologic response to rapid auditory stimuli. The goal of ASSR is to create an estimated audiogram from which questions regarding hearing, hearing loss, and aural rehabilitation can be answered. ASSR allows the hearing care professional to create statistically valid audiograms for those unable or unwilling to participate in traditional behavioral tests. ASSR relies on statistical measures to determine if and when a threshold is present.test hearing

Testing for Adults

Pure Tone Audiometry

It involves carefully listening through headphones that are placed over the ears or inserting earphones that are placed in the ear canals. The patient will be asked to listen for tones or beeps that vary in pitch and loudness and instructed to press a button when they hear the tones. The tones will be presented through the headphones and/or insert earphones, as well as through a bone conduction vibrator on a headband that is placed behind the ear. By completing the basic tests that have been described, both the type and degree of hearing loss that the patient may have can be determined.test hearing

Speech Audiometry

Speech audiometry has become a fundamental tool in hearing-loss assessment. In conjunction with pure-tone audiometry, it can aid in determining the degree and type of hearing loss. Speech audiometry also provides information regarding discomfort or tolerance to speech stimuli and information on word recognition abilities.test hearing

Special Tests

PI-PB (Performance intensity Phonetically balanced), SISI (Short Incriment sensitivity index), ABLB (Alternate binaural loudness balance), TDT (Tone decay test). SPIN (Speech in Noise test) etc. these tests help to differenciate between cochlear versus retro cochlear lesion.test hearing

Immittance

Acoustic immittance testing evaluates the eardrum and the middle ear space behind the eardrum, as well as a muscle reflex that involves the eardrum and middle ear, the inner ear, the auditory nerve, the auditory brainstem pathways and the facial nerve. Acoustic immittance testing helps to localize what part of the ear may be involved in hearing loss.test hearing

OAE’s

The OAE test is used to find out how well your inner ear, or cochlea, works. It measures otoacoustic emissions, or OAEs. These are sounds given off by the inner ear when responding to a sound. There are hair cells in the inner ear that respond to sound by vibrating. The vibration produces a very quiet sound that echoes back into the middle ear. This sound is the OAE that is measured.

ABR

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. The ABR is also used if your symptoms might be due to hearing loss in the brain or in a brain pathway.test hearing

ASSR

The auditory steady-state response (ASSR) can be thought of as an electrophysiologic response to rapid auditory stimuli. The goal of ASSR is to create an estimated audiogram from which questions regarding hearing, hearing loss, and aural rehabilitation can be answered. ASSR allows the hearing care professional to create statistically valid audiograms for those unable or unwilling to participate in traditional behavioral tests. ASSR relies on statistical measures to determine if and when a threshold is present.test hearing

Electrocochleography (ECochG)

Electrocochleography (ECochG) is another test that measures electrical activity that occurs in response to sound. During ECochG testing, electrical activity that is generated in the hearing portion of the inner ear called the cochlea is measured. Electrical activity from the hearing nerve is also recorded. the patient can sleep during the test session. Changes in the electrical activity recorded from the cochlea may aid in the diagnosis of inner ear disorders, such as Meniere’s disease, perilymphatic fistula, and semicircular canal dehiscence.

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Hearing Test Types

Audiological Testing

Basic audiogram
This test determines the patient’s hearing ability relative to normal adult hearing levels to determine if there is a hearing loss, where it occurs and its type or classification. This information is critical to determine if medical or surgical intervention is possible or if hearing aids may help. Enhanced communication strategies may also be discussed during this session.
Special Tests
 

  • SISI
  • ABLB
  • TDT

 

 

Other Testing

Tympanometry Testing
Tympanometry or acoustic immittance testing is often an integral part of the test battery. This test is used to assess the status of the middle ear and related structures. Tympanometry measures the movement of the ear drum (tympanic membrane). This information is used in the diagnosis of middle ear disease or other problems that might restrict ear drum movement.
Acoustic Reflexes
Acoustic reflexes are measured in order to determine whether the middle ear muscles are properly reacting to loud sounds. This test can also be used to assist in testing of hearing in young children and/or to identify other otologic problems.
Auditory Brainstem Response Audiometry
Auditory Brainstem Response Audiometry (ABR), or Brainstem Auditory Evoked Response (BAER), is an objective procedure used to measure the function of the brainstem in response to sound. The results can provide general information regarding hearing sensitivity. This test can also be used for neuro-diagnostic purposes, to determine if the brainstem is transmitting sound properly.

A series of clicks or tones are presented to the patient while she/he rests or sleeps. Electrodes are placed on the head to detect the response of the brainstem to the sounds; the electrodes do not cause any pain or discomfort.

Bone Conduction BERA
With BC ABR we can also test patients with congential External and Middle malformations. Additional use of BC BERA with AC BERA can also indicate type of Hearing loss. This test not only confirm a conductive loss but also helps to calculate the amount of hearing loss due to the conductive component.
Electro Cochleography (EcochG)
Electrocochleography is used to diagnose Meniere’s Disease.We use non invasive gold plated tiptrodes.
Otoacoustic Emissions (OAEs : DPOAEs & TEOAEs)
Otoacoustic emissions (OAE) are inaudible sounds emitted by the cochlea when the cochlea is stimulated by a sound. When sound stimulates the cochles, the outer hair cells vibrate. The vibration produces an inaudible sound that echoes back into the middle ear. The sound can be measured with a small probe insertedinto the ear canal.

Persons with normal hearing produce emissions. Those with hearing loss greater than 25-30 db does not emitted. OAEs can detect blockage in the outer ear canal,middle ear fluid, and damage to the outer hair cells in the cochlea.

Auditory Steady State Evoked Potentials (SSEPs)
Latest technology for hearing assessment of an infant as old as 7 day. Results are in the form of automated audiograms generated by the special software.

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