BERA (Brainstem Evoked Response Audiometry)

Overview

BERA (Brainstem Evoked Response Audiometry), also known as the auditory brainstem response (ABR) test, is an objective way to assess hearing and the function of the hearing nerve pathway. Soft earphones deliver clicking or tone sounds while small sensor electrodes placed on the scalp record the tiny electrical responses generated by the hearing nerve and brainstem.

Because it does not depend on the person actively responding, BERA is especially valuable for newborns, infants, young children, and anyone who cannot reliably take part in standard hearing tests. It is used both to estimate hearing levels and to help investigate problems along the nerve pathway from the ear to the brain.

This page is an educational overview only. It is not medical advice, and no result can be guaranteed in advance. A specialist decides whether BERA is the right test for you or your child.

Who May Need This

BERA is commonly recommended for newborns who do not pass hearing screening, for infants and young children who cannot cooperate with behavioural hearing tests, and for children with speech, language, or developmental delay where hearing needs to be confirmed. It is also used before or after interventions such as cochlear implants.

In adults, BERA may be used to investigate certain patterns of hearing loss, ringing in the ears (tinnitus), dizziness, or suspected problems of the hearing nerve pathway. The need for the test is determined by an ENT specialist or audiologist based on symptoms, screening results, and history.

When It May Be Recommended

A specialist may recommend BERA when an objective, reliable measure of hearing is needed — for example, when a child is too young for standard testing, when behavioural test results are unclear, or when there is concern about the hearing nerve rather than the ear itself. It is also used to monitor hearing over time in certain conditions.

The decision is based on the clinical question to be answered and the reliability of other tests already done. Because BERA is safe and non-invasive, the main considerations are the need for stillness or sedation in young children. The final recommendation depends on individual evaluation.

Diagnosis and Evaluation

Before BERA, the specialist reviews the reason for testing, any previous hearing screens, ear infections, family history of hearing loss, and general development. The ears are examined to ensure the canals are clear, since wax or fluid can affect results, and other tests such as otoacoustic emissions or tympanometry may be done alongside.

For young children, a plan is made for the child to be asleep or, if necessary, lightly sedated during the recording. The results are interpreted together with other hearing tests and the overall clinical picture, and a second opinion may be valuable for major decisions such as implantation.

Treatment Options

BERA is a diagnostic test, not a treatment. Its purpose is to guide the right management by clarifying whether and how much hearing is affected and where the problem lies along the hearing pathway.

Depending on the findings, options that may follow include monitoring and repeat testing, treating middle-ear fluid or infection, fitting hearing aids, referral for a cochlear implant assessment, speech and language therapy, or further investigation such as imaging if a nerve pathway problem is suspected.

How It Is Performed

The test is done in a quiet room. The skin is gently cleaned and small electrode stickers are placed on the scalp and behind or on the ears. Soft insert earphones or headphones deliver a series of clicking sounds at different volumes, while the electrodes record the nerve responses, which a computer averages into characteristic waveforms.

The person must stay still and relaxed, so infants and young children are usually tested during natural sleep or with light sedation. The recording typically takes 30 minutes to over an hour depending on how much information is needed. Nothing enters the body and the test is painless.

Preparation

For adults and older children, preparation is minimal — clean, product-free hair helps the electrodes stick, and staying relaxed improves the recording. For young children who will sleep naturally, teams often advise timing the test around a nap and keeping the child awake beforehand so they settle during testing.

If sedation is planned, fasting instructions must be followed and any medications reviewed with the team. If travelling abroad, bring copies of prior hearing tests and medical records, and plan for the results to be shared with your home doctor.

Benefits and Expected Goals

The main benefit of BERA is an objective, reliable estimate of hearing that does not depend on the person responding, which is invaluable in babies and young children. Early identification of hearing loss allows earlier support, which can help speech, language, and development.

The test also helps distinguish where a problem lies along the hearing pathway, guiding further care. BERA provides information rather than treatment, and its results are always interpreted alongside other tests and the overall clinical picture.

Risks and Possible Complications

BERA itself is very safe, as it is non-invasive and painless. The recording electrodes only listen to natural nerve signals; no electricity is passed into the body.

• Minor, temporary skin redness or irritation where electrodes are placed
• Results occasionally affected by wax, middle-ear fluid, or movement, sometimes needing a repeat test
• If sedation is used in a child, the usual risks of sedation, which the team monitors closely

Your care team will explain any risks relevant to sedation and how they are managed. For the test itself, there are essentially no physical risks.

Recovery, Follow-up & Aftercare

There is no recovery needed after the test itself; normal activities can resume immediately. If sedation was used, the child is monitored until fully awake, and the team gives specific advice on feeding, activity, and watching for drowsiness for the rest of the day.

Results are usually explained by the specialist, who plans any next steps such as hearing aids, further tests, or referral. If you have travelled abroad, ensure the report and waveforms are shared with your home doctor and arrange follow-up before returning.

Medical Tourism Planning

If you are arranging BERA abroad, choose a JCI- or ISO-accredited hospital or accredited audiology centre, ideally with paediatric audiology experience if the test is for a child. Confirm whether sedation may be needed and how it is supervised, and request a written plan and cost estimate before travelling.

Plan for the results and any recommendations to reach your doctor at home so that follow-up, hearing aids, or further assessment can continue. Consider medical travel insurance.

Estimated Cost Factors

The cost of BERA depends on the country and centre, whether sedation and monitoring are required, whether it is combined with other hearing tests, and specialist and audiologist fees. Paediatric testing that needs sedation generally involves more resources.

Many international destinations offer these tests at a fraction of typical prices in higher-cost countries, but figures vary by case. Online prices are only estimates — always request a personalized written quote for your specific situation before deciding.

Choosing a Hospital or Specialist

Look for a hospital or clinic with recognised accreditation and qualified audiologists, and, for children, experience in paediatric hearing assessment and safe sedation. Confirm that equipment and interpretation follow recognised standards.

Ask about how results are reported, international patient services, and how findings and follow-up will be shared with your home doctor. Clear written information and cost estimates are signs of a reliable programme.

Alternatives

Depending on age and the clinical question, alternative or complementary hearing tests include otoacoustic emissions (OAE) for screening, pure-tone and behavioural audiometry for those who can respond, and tympanometry to check middle-ear function. Imaging may be added if a structural or nerve problem is suspected.

BERA is often the most reliable option when an objective measure is needed in someone who cannot take part in behavioural testing. Discuss the choice of tests with your ENT specialist or audiologist so the assessment fits your situation.

Questions to Ask Your Doctor

• Why is BERA the right test for me or my child, and what will it tell us?
• Will sedation be needed, and how is it supervised?
• Will other hearing tests be done at the same time?
• How and when will we get the results, especially if we are travelling home?
• What are the possible next steps depending on the findings?
• Might the test need to be repeated, and why?
• What is included in the written cost estimate?