Introduction
Healthy hearing is the foundation for the development of language, speech and understanding in babies. Assessing hearing during the first months of life is extremely important in order to detect any possible disorder and to take early action. In this post we discuss the importance of hearing tests for babies, the types of tests used, and what parents should keep in mind during this process.
Why Is Hearing Assessment Important for Babies?
Hearing plays a central role in a child's language and social development. Babies begin to respond to sounds in the very first months of life, unconsciously absorbing elements of language and building the foundations for speaking and for understanding the world around them. If a baby has an untreated hearing problem, they may struggle to develop these skills, which can later affect speech, communication and social and academic development.
Which Signs May Point to a Hearing Problem?
Some signs that may indicate hearing difficulties include:
- The baby does not startle or react to loud sounds.
- The baby does not turn their head towards the parents' voice or towards noises in the room.
- The baby shows no interest in the source of sounds, such as music or toys that make noise.
- At the age of 6–9 months, the baby does not produce sounds to imitate the voices they hear.
However, many children with hearing problems may not show clear signs straight away, which is why hearing testing at an early stage is decisive.
The Main Methods of Hearing Assessment in Babies
Hearing assessment in babies is carried out through objective tests that do not require active participation from the child. Some of the most frequently used tests for assessing hearing in babies include:
1. Otoacoustic Emissions (OAE)
OAE is a test that uses a small microphone to record the responses of the inner ear (cochlea) to sounds. This test shows whether the inner hair cells of the ear are responding properly to sound and is usually used as an initial screening test in hospitals or clinics. OAE is a quick and painless test that indicates the overall function of the inner ear.
2. Auditory Brainstem Response (ABR)
ABR, or the test of the brainstem's response to sound, is another advanced method used in babies. During this test, electrodes placed on the head measure the signals the brain sends in response to sounds. This test is important for detecting problems of the auditory nerve or neurological disorders related to hearing, and it is likewise painless.
3. Behavioural Response Tests
In some cases, for older babies who may be somewhat more aware of the sounds around them, assessment methods can be used that measure the baby's reaction to voices, such as turning the head towards the source of the sound or looking at the parent's face when hearing their voice. These are supporting tests used to confirm the results of the objective tests.
When Should the Hearing Test Be Carried Out?
Health organisations recommend that hearing tests for babies be carried out as early as possible after birth, ideally within 1 month. If the initial test shows signs of hearing concerns, a full assessment should be carried out within 3 months and, if hearing loss is confirmed, intervention and treatment should begin within 6 months.
Early assessment is important because it makes early intervention possible, helping the baby to acquire language and develop speech without major delays.
How Should Parents Prepare for the Hearing Test?
- Keep the baby calm: Before the test, make sure the baby has been fed and is settled, to avoid restlessness. In some cases the test is performed while the baby is asleep.
- Learn about the procedure: Parents often feel more at ease when they know what to expect from the test. Audiologists explain the procedure and carry it out in a safe and comfortable environment for the child.
- Discuss any doubts: If you have any questions or concerns about the process, do not hesitate to consult your audiologist. They are ready to provide guidance and detailed information about every stage of the assessment.
What Happens After the Test?
Once the hearing test is complete, the audiologist will explain the results to the parents. If any problem is found, parents may be referred for further additional tests or advised on early intervention options, such as hearing aids, cochlear implants, or supportive therapy for speech development.