My Baby Was Born Without an Ear Canal — Will They Be Able to Hear? A Parent's Guide to Aural Atresia and Microtia
You have just welcomed your baby into the world.
As you hold them, you notice something unexpected.
One ear looks smaller than the other.
Perhaps the outer ear's normal folds are not fully formed.
When you look more closely, you cannot see the usual opening leading into the ear canal.
You begin wondering:
“Why has my baby's ear developed differently?”
“Can they hear through that ear?”
“Will this affect their speech?”
“Will they need surgery?”
These are understandable questions.
One possible explanation is a congenital condition called aural atresia, sometimes associated with microtia.
Although the ear's appearance may be noticeable at birth, the most important early question concerns hearing.
What is congenital aural atresia?
Aural atresia is a developmental condition in which the external ear canal has not formed normally.
The ear canal is the passage that normally carries sound from the outside of the ear towards the eardrum.
In complete atresia, the usual external ear-canal opening is absent.
In other children, the canal may be present but unusually narrow. This is called ear-canal stenosis.
The eardrum and middle-ear structures may also develop differently.
The Evelina London specialist microtia and atresia service explains these anatomical differences and what they mean for hearing.
What is microtia?
Microtia means the visible outer ear develops differently.
The ear may be smaller than usual, have fewer natural cartilage folds or be significantly underdeveloped.
Microtia can affect one ear or both ears.
It often occurs alongside aural atresia because the outer ear and ear canal develop during related stages of pregnancy.
However, the two conditions are not identical.
A child can have microtia with a partly formed ear canal.
Another child may have a narrow or absent ear canal with a relatively well-formed outer ear.
Why does aural atresia happen?
The external ear and ear canal develop during early pregnancy.
This involves several complex stages of tissue growth and differentiation.
Occasionally, development does not follow the usual pattern.
The result may be a smaller external ear, a narrow canal or complete absence of the canal.
In many children, the cause is not clearly identifiable.
Some cases occur alongside other congenital differences or recognised genetic syndromes.
Most importantly, parents should not assume that the condition resulted from how the baby was positioned or cared for during pregnancy.
Can my baby hear without an ear canal?
Sometimes, yes — but hearing is usually affected on the side with complete atresia.
Normally, sound travels through the ear canal, vibrates the eardrum and passes through the tiny middle-ear bones towards the inner ear.
When the canal is absent, this normal sound pathway is interrupted.
The result is commonly conductive hearing loss.
However, the inner ear, including the cochlea, may still function normally.
This distinction matters because some hearing devices can transmit sound through bone vibration, bypassing the absent canal and affected middle-ear structures.
What if only one ear is affected?
Some babies have unilateral aural atresia, meaning only one side is affected.
The other ear may hear normally.
This can allow the child to develop spoken language and respond to everyday sounds.
However, hearing with one ear is not the same as hearing with two.
Some children have difficulty identifying where sounds come from.
They may also struggle to understand speech in noisy environments.
The Evelina London microtia clinic emphasises the importance of assessing both ears and considering appropriate hearing support.
What if both ears are affected?
Bilateral aural atresia means that both external ear canals are absent or significantly underdeveloped.
This can create a more substantial barrier to hearing spoken language.
Early identification and hearing rehabilitation are particularly important.
Children with bilateral atresia may benefit from bone-conduction hearing devices during infancy.
These devices provide an alternative route for sound to reach the inner ear.
The aim is to support access to sound, communication and language development.
The exact rehabilitation plan depends on the child's hearing assessment and wider developmental needs.
Does my baby still need newborn hearing screening?
Yes.
All babies in England are offered newborn hearing screening.
The NHS usually offers screening before four weeks of age, although it can be performed up to three months.
However, a baby with an absent ear canal may require a modified assessment because the usual screening earpiece cannot be inserted into that ear.
The audiology team can select appropriate tests.
A specialist diagnostic assessment is important even if the opposite ear appears normal.
NHS newborn hearing screening information explains the national programme.
How is hearing tested in babies with aural atresia?
Babies cannot tell us whether they hear a particular sound.
Audiologists therefore use objective tests that measure responses from the hearing system.
One important investigation is the auditory brainstem response test, often abbreviated to ABR.
Small sensors are placed on the baby's head while the baby hears carefully controlled sounds.
Bone-conduction testing can assess the inner ear when the normal external-ear pathway is unavailable.
The results help determine the type and degree of hearing loss.
Not every baby needs exactly the same combination of tests.
What is a bone-conduction hearing aid?
A bone-conduction hearing device transmits sound through vibration rather than relying on the normal ear canal.
A small sound processor converts sound into mechanical vibrations.
These vibrations travel through the skull towards the cochlea.
For babies and young children, a soft headband can sometimes hold the processor in place.
This avoids the need for an implanted device during early childhood.
An appropriately trained audiology team must select, fit, and adjust the device.
Evelina London's bone-conduction hearing information explains how these devices work.
Does every child with one normal ear need a hearing aid?
Not necessarily.
The decision depends on the child's hearing, listening needs, age and family preferences.
Some children with unilateral atresia benefit from a trial of bone-conduction amplification.
Others may initially be monitored with regular hearing assessments and practical listening support.
The specialist team will consider how the child hears in quiet and noisy environments.
The specialist team should discuss the potential benefits and limitations of amplification openly.
Do not present a device as automatically necessary or automatically unnecessary simply because one ear hears normally.
Will aural atresia affect my child's speech?
It can affect access to sound, but the impact varies considerably.
Children with bilateral hearing loss may face greater challenges accessing spoken language without appropriate support.
Children with one normally hearing ear may develop speech and language well.
However, some experience difficulties understanding speech in noisy environments, localising sounds, or listening fatigue.
Regular audiology review helps identify problems early.
Where appropriate, speech and language therapy and specialist educational support may be recommended.
The aim is to support the child's communication development rather than assume that hearing loss will inevitably cause language delay.
What can parents do at home?
Communication begins long before a baby says their first word.
Talk, sing and respond to your baby during everyday activities.
Use facial expressions and natural gestures.
Allow your child to see your face when you speak.
As they grow, reduce unnecessary background noise when giving important instructions.
If one ear hears better, consider positioning yourself so your child can access your voice comfortably.
However, do not rely solely on the apparently better ear.
Follow the audiology team's advice about hearing devices and developmental monitoring.
Will my child need a CT scan?
Not every baby with aural atresia requires an immediate CT scan.
CT provides detailed images of the temporal bone, including the ear canal and middle-ear structures.
It may be useful when specialists consider particular surgical options.
However, CT uses ionising radiation.
The specialist team should therefore determine the timing and need for imaging.
Early hearing assessment usually takes priority over imaging done solely to assess external appearance.
Other investigations may be appropriate when additional congenital or neurological abnormalities are suspected.
Can surgeons create an ear canal?
In selected children, surgeons may consider reconstructing an external ear canal.
This is sometimes called atresiaplasty or canalplasty.
However, not every child has suitable anatomy.
The surgeon must assess the position and development of the middle-ear structures and facial nerve.
Potential complications include recurrent narrowing, infection, persistent hearing loss and the need for further procedures.
Some children may benefit more from bone-conduction devices than from canal reconstruction.
The decision requires specialist assessment and shared decision-making.
Can the outer ear be reconstructed?
Yes, in selected children.
External-ear reconstruction is a separate consideration from hearing rehabilitation.
Options may include reconstruction using the child's own tissue, selected implant-based techniques or an external ear prosthesis.
The appropriate approach depends on age, anatomy and individual circumstances.
The child's own wishes become increasingly important as they grow older.
The Evelina London microtia clinic notes that ear reconstruction is generally considered when children are older, often around 10–13 years, when tissue has developed enough to support the procedure.
You don't need to assume every child will want reconstruction.
What does recent research tell us?
A study published on 18 February 2026 in Trends in Hearing examined children and adolescents with bilateral aural atresia who used bone-conduction hearing devices.
The researchers compared 11 device users with 11 age-matched controls.
They found that bilateral device use improved localisation of stationary sound compared with unilateral device use.
However, performance remained different from that of children with typical hearing, and the benefits for moving sound sources were less consistent. Sage Journals
This small study involved older children and adolescents, not newborn babies.
Therefore, it cannot predict outcomes for an individual infant.
Nevertheless, it reinforces the importance of understanding hearing beyond simply detecting sound.
What happens when my child starts nursery or school?
Children with unilateral or bilateral hearing differences may benefit from practical classroom adjustments.
Teachers should understand the child's hearing profile.
Useful measures can include appropriate seating, reducing background noise and checking that verbal instructions have been understood.
Some children benefit from additional classroom hearing technology.
Others require relatively little adjustment.
Regular hearing reviews remain important because hearing in the opposite ear can change independently of the congenital condition.
The aim is to help the child participate confidently without unnecessarily restricting normal activities.
When should parents seek urgent medical advice?
Congenital aural atresia itself is not usually an emergency when the baby is otherwise well, and hearing assessment is being arranged.
However, your child needs urgent medical assessment if they develop significant ear pain, swelling, discharge, fever, or a new hearing change.
A child with aural atresia who suddenly appears unable to hear through their previously hearing ear requires urgent assessment.
Call 999 for severe breathing difficulty, seizures, collapse, reduced consciousness or another life-threatening emergency.
Do not probe an absent or narrow ear canal, or insert cotton buds or other objects.
Where can families in London and Essex seek assessment?
The first step is usually a paediatric audiology assessment, with ENT specialist support when appropriate.
Local NHS services recognise congenital microtia and atresia as indications for hearing evaluation.
The NELFT paediatric audiology referral guidance specifically identifies microtia and atresia among relevant hearing-risk factors.
For more complex congenital ear differences, specialist multidisciplinary services such as the Evelina London microtia and atresia clinic may be appropriate.
Mr Gaurav Kumar, Consultant ENT Surgeon, assesses children across London and Essex with hearing difficulties and congenital or acquired ear conditions.
Where necessary, referral to a specialist microtia, hearing-implant or paediatric ear-reconstruction team may be recommended.
The key message for parents
A baby born without an external ear canal may have congenital aural atresia, sometimes associated with microtia.
The appearance of the ear does not establish how well the inner ear functions.
Early audiology assessment helps determine the child's hearing and whether additional support is appropriate.
Bone-conduction hearing devices can provide an alternative route for sound in selected children.
Surgery is not automatically required in infancy, and ear reconstruction decisions can usually wait.
If your baby is born with an absent or unusually narrow ear canal, arrange a specialist hearing assessment early. Understanding their hearing is the first priority.
This article provides general educational information and does not replace individual medical advice.
FREQUENTLY ASKED QUESTIONS
1. Can a baby hear without an ear canal?
Yes, the inner ear may still function. However, complete aural atresia commonly causes conductive hearing loss because sound cannot travel through the usual external-ear pathway. Hearing tests are needed to establish the degree of hearing loss.
2. Is microtia the same as aural atresia?
No. Microtia describes an underdeveloped external ear. Aural atresia describes an absent external ear canal. The conditions often occur together but are not the same.
3. Will my child develop normal speech?
Many children with unilateral atresia and normal hearing in the opposite ear develop spoken language well. Children with bilateral hearing loss may need earlier hearing rehabilitation and additional communication support.
4. What is a bone-conduction hearing aid?
It is a hearing device that transmits sound through skull vibrations to the inner ear, bypassing the external ear canal and middle-ear structures.
5. Does every child need ear reconstruction?
No. Reconstruction is an individual decision based on anatomy, age, the child's wishes, and family preferences. Hearing rehabilitation and external-ear reconstruction are separate considerations.
6. Can surgery create an ear canal?
In selected children, surgeons may be able to reconstruct the canal. However, not every child has suitable anatomy, and surgery carries risks including recurrent narrowing and persistent hearing problems.
7. When should hearing tests begin?
Assessment should begin during infancy. Babies with suspected congenital hearing differences should not wait until school age for a diagnostic hearing evaluation.
8. Does aural atresia affect only one ear?
It may affect one or both ears. Unilateral atresia is more common, but bilateral cases require particular attention to early hearing rehabilitation.
Disclaimer: This information is intended for general educational and regional SEO purposes only and does not replace personalised clinical advice. For a definitive structural evaluation, you need a face-to-face consultation with a registered specialist.
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