Newborn Hearing Diagnostic Evaluation (Auditory Brainstem Response – ABR)

A Newborn Hearing Diagnostic Evaluation, also called an Auditory Brainstem Response (ABR) test, is a safe, painless test used to determine how well your baby's hearing system is working. This test is often recommended if your baby did not pass the newborn hearing screening, stayed in the NICU, has a family history of hearing loss, or if there are concerns about their hearing.

During the evaluation, small sensors are placed on your baby's head, and soft earphones play gentle sounds. The sensors measure how the hearing nerve and brain respond to these sounds. Your baby does not need to respond or perform any tasks during the test.

How to Prepare for the Appointment

For the most accurate results, your baby should be asleep throughout the test. To help your baby sleep:
  • Bring your baby to the appointment very sleepy, staying awake for at least 1–2 hours before the appointment.
  • Feed your baby just before or when you arrive for the appointment so they are comfortable and sleepy.
  • Dress your baby in comfortable clothing and bring a favorite blanket, pacifier, or other comfort item.
  • Follow any additional instructions provided by your audiologist.
Swaddled baby sleeping
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What to Expect and Why Early Diagnosis Matters

The test typically takes 1–2 hours, depending on how easily your baby falls asleep and how much information needs to be collected. Once the evaluation is complete, the audiologist will review the results and discuss any recommended next steps if additional care is needed.

Early diagnosis of hearing loss is important because it allows families to access the support and treatment that can help children receive early intervention services as needed.  Early intervention services can help develop speech, language, communication skills, and mentorship from the very beginning.

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