Newborn Hearing Screening

What Is Newborn Hearing Screening?

Newborn hearing screening is a quick, painless test offered to every baby born in the United Kingdom, designed to detect permanent hearing loss as early as possible — ideally within the first few weeks of life. In England, the programme is known as the NHS Newborn Hearing Screening Programme (NHSP) and has been operational nationally since 2006. Equivalent programmes run in Scotland (through the Scottish Government`s Universal Newborn Hearing Screening Programme), Wales (managed by Public Health Wales), and Northern Ireland (through the Health and Social Care Trusts). Together, these programmes screen over 98% of eligible babies born each year across the UK, making newborn hearing screening one of the most successful public health initiatives in the country.

The rationale behind universal newborn screening is compelling. Approximately 1 to 2 babies in every 1,000 are born with permanent hearing loss in one or both ears, according to data from the NHSP and the RNID (Royal National Institute for Deaf People). Without screening, the average age at which childhood hearing loss was identified was around 18 months to 3 years — by which time the critical early window for speech and language development had already begun to close. With newborn screening, the vast majority of affected babies are now identified before they are three months old, and support can begin before six months — the threshold recommended by international guidelines for achieving optimal developmental outcomes.

Why Early Detection Matters

The importance of early identification of hearing loss cannot be overstated. The first months and years of life are a critical period for speech, language, cognitive, and social-emotional development. Hearing is the primary channel through which babies absorb language — from the rhythms and melodies of speech to the individual sounds that make up words. When hearing loss goes undetected, the consequences can be far-reaching:

• Delayed speech and language development: Children with unidentified hearing loss may be significantly behind their hearing peers in vocabulary, sentence structure, and conversational skills by the time they start school
• Educational disadvantage: Language underpins learning in every subject. Children with untreated hearing loss often struggle with reading, writing, and classroom participation
• Social and emotional impact: Difficulty communicating can lead to frustration, isolation, behavioural difficulties, and reduced confidence
• Lifelong consequences: Research published in the International Journal of Pediatric Otorhinolaryngology and endorsed by NICE shows that the effects of late-identified hearing loss can persist into adulthood, affecting employment, relationships, and mental health

Conversely, the evidence for early intervention is overwhelming. The Joint Committee on Infant Hearing (JCIH) — the international authority on early hearing detection — recommends that babies should be screened by one month of age, diagnosed by three months, and enrolled in intervention by six months (the 1-3-6 guideline). Studies show that children whose hearing loss is identified and managed within these timescales achieve speech and language outcomes comparable to their hearing peers. The UK`s newborn screening programme is designed to meet and exceed these benchmarks.

How the Screening Test Works — AOAE

The primary screening test used in the NHSP is the Automated Otoacoustic Emissions (AOAE) test. This test works by detecting the tiny sounds produced by a healthy inner ear (cochlea) in response to sound stimulation — a phenomenon known as otoacoustic emissions.

The procedure

A trained hearing screener — usually a newborn hearing screener, maternity support worker, or health visitor — places a small, soft-tipped earpiece (probe) gently into the baby`s ear canal. The device plays a series of quiet clicking sounds into the ear and simultaneously records the faint echoes (emissions) generated by the outer hair cells of the cochlea. In a normally functioning inner ear, these emissions are reliably present and can be detected by the probe`s sensitive microphone. The entire test typically takes just a few minutes per ear.

What the baby experiences

The test is completely painless and non-invasive. There are no needles, no discomfort, and no sedation. Babies do not need to be awake — in fact, the test works best when the baby is settled, calm, or asleep. Most babies sleep through the entire screening without any awareness that it is happening. Parents are encouraged to feed their baby shortly before the test to help them settle.

When it is done

The NHSP recommends that screening is completed within the first four to five weeks of life. For babies born in hospital, the screening is often performed on the postnatal ward before discharge — sometimes within hours of birth. For babies born at home or in a birthing centre, or for those who missed the hospital screening, the health visitor will arrange for the test to be performed during an early home visit or at a local clinic. If your baby has not been screened by the time they are four weeks old, contact your health visitor or GP to arrange it.

What Happens If Baby Does Not Pass — the AABR Test

It is important to understand that a "refer" result on the AOAE test does not necessarily mean the baby has a hearing loss. There are many reasons why a clear response may not be obtained on the first attempt:

• Fluid or debris in the ear canal: Newborn ear canals often contain vernix, amniotic fluid, or other debris that can block the probe signal. This usually clears within the first few days
• Middle ear fluid: Many newborns have residual fluid in the middle ear from the birth process, which dampens the emission signal
• Background noise: The AOAE test requires a reasonably quiet environment. A noisy ward or a fussy baby can interfere with the recording
• Baby movement or restlessness: Movement artefact can prevent a clear recording

If the first AOAE screen gives an unclear result, it is repeated — often on the same day or within a few days. If the second attempt also does not produce a clear response, the baby is referred for an Automated Auditory Brainstem Response (AABR) test.

How the AABR test works

The AABR test measures the electrical activity of the auditory nerve and brainstem in response to sound, using three small sensor pads placed on the baby`s head and neck. Soft headphones or ear couplers deliver clicking sounds into the ears, and the sensors detect the nerve`s response. Like the AOAE, the AABR is completely painless and is best performed while the baby is asleep. It provides information about the entire auditory pathway from the cochlea to the brainstem, making it a more comprehensive test than AOAE alone.

The AABR test is also the primary screening method for babies who have spent more than 48 hours in a neonatal intensive care unit (NICU) or special care baby unit, as these babies are at higher risk of auditory neuropathy spectrum disorder (ANSD) — a condition that can be missed by AOAE alone because the outer hair cells may be functioning normally while the auditory nerve is affected.

Risk Factors for Newborn Hearing Loss

While the majority of babies with permanent hearing loss are born into families with no history of deafness — which is precisely why universal screening is so vital — certain risk factors increase the likelihood of congenital hearing loss:

• Family history: A first-degree relative (parent or sibling) with permanent childhood hearing loss increases risk significantly. Genetic causes account for approximately 50–60% of congenital hearing loss (RNID)
• Neonatal intensive care: Babies who spend more than 48 hours in NICU are at elevated risk due to factors including prematurity, low birth weight, hyperbilirubinaemia (severe jaundice requiring exchange transfusion), ototoxic medications (such as aminoglycoside antibiotics), and mechanical ventilation
• Congenital infections: The TORCH group of infections — particularly cytomegalovirus (CMV) — is a significant cause of congenital hearing loss. CMV is the most common non-genetic cause, responsible for approximately 15–20% of congenital hearing loss cases. Rubella, toxoplasmosis, and herpes simplex can also cause hearing damage in utero
• Craniofacial anomalies: Conditions affecting the structure of the head, face, or ears — including cleft palate, microtia, and atresia — are associated with both conductive and sensorineural hearing loss
• Syndromes associated with hearing loss: Conditions such as Down syndrome, Usher syndrome, Waardenburg syndrome, and Treacher Collins syndrome include hearing loss as a feature
• Meningitis: Bacterial meningitis in the neonatal period can cause severe or profound sensorineural hearing loss and is an indication for urgent audiological assessment and consideration of cochlear implantation

Babies with any of these risk factors should receive the AABR test as their primary screen (not just AOAE) and should be monitored with ongoing audiological surveillance, as some forms of hearing loss — particularly CMV-related hearing loss — can be progressive or late-onset, appearing months or even years after birth.

After Screening — Diagnosis and Early Intervention

Babies who do not pass the newborn hearing screening are referred to a paediatric audiology service for comprehensive diagnostic assessment. This typically includes:

• Diagnostic ABR: A more detailed version of the screening AABR, performed under natural sleep or light sedation, which measures hearing thresholds across different frequencies. This provides an audiogram-like picture of the baby`s hearing
• Otoacoustic emissions testing: To assess outer hair cell function in more detail
• Tympanometry: To evaluate middle ear function and rule out conditions such as glue ear
• Visual reinforcement audiometry (VRA): Used for babies from around six months of age, where the baby is rewarded with a visual display (such as an illuminated toy) when they turn towards a sound source. This is part of the children`s hearing test pathway

Once the type and degree of hearing loss has been established, the paediatric audiology team will discuss management options with the family. These may include:

• Hearing aids: For babies with mild to severe hearing loss, NHS hearing aids can be fitted from as young as a few weeks old. Modern paediatric hearing aids are small, lightweight, and designed to be comfortable and secure for tiny ears
• Cochlear implants: For babies with severe to profound sensorineural hearing loss who do not benefit sufficiently from hearing aids, cochlear implantation may be recommended. NICE guidelines (TA566) support cochlear implantation for children, and the procedure can be performed from around 12 months of age (or younger in some cases, such as post-meningitis). The UK has several specialist cochlear implant centres
• Bone-anchored hearing devices: For babies with conductive or mixed hearing loss, bone-conduction hearing devices may be offered — initially on a soft headband before any surgical option is considered
• Communication support: Families are offered guidance on communication approaches, which may include spoken language (auditory-verbal or auditory-oral therapy), British Sign Language (BSL), or a combination of both. The choice is the family`s, and professionals support whichever approach the family chooses

Family Support and Resources

A diagnosis of hearing loss in a newborn baby can be an emotional experience for families, even when the outcome is ultimately positive. Several UK organisations provide outstanding support:

• National Deaf Children`s Society (NDCS): The UK`s leading charity for deaf children and their families, offering a free helpline (0808 800 8880), family support workers, technology information, educational guidance, and a wealth of resources for every stage from diagnosis onwards. Visit ndcs.org.uk
• RNID: Provides information on childhood hearing loss, communication options, and technology. Visit rnid.org.uk
• NHS hearing services: Paediatric audiology services are provided free on the NHS, including hearing aids, batteries, moulds, repairs, and ongoing support. See our guide to NHS hearing services for more detail on what is available
• Sense: Supports families of children with multi-sensory impairment (combined hearing and vision loss)
• Local authority early support teams: Many local authorities have specialist early years teams that work with families of deaf and hearing-impaired children, providing home visits, advice, and links to local services

Screening in the Devolved Nations

While the principles and procedures of newborn hearing screening are consistent across the UK, the programmes are managed independently in each nation:

• England: The NHS Newborn Hearing Screening Programme (NHSP), commissioned by NHS England and managed by the NHSP national team
• Scotland: The Universal Newborn Hearing Screening Programme, managed by the Scottish Government and delivered through NHS boards
• Wales: Managed by Public Health Wales as part of the national screening programmes
• Northern Ireland: Delivered through Health and Social Care Trusts

All four nations use the same core screening protocols (AOAE and AABR) and adhere to quality standards set by the UK National Screening Committee. Coverage rates exceed 98% across all nations — a remarkable achievement that reflects the dedication of the screening workforce and the engagement of families.

What If My Baby Missed the Screening?

If your baby was not screened before leaving hospital, was born at home, or was missed for any other reason, it is not too late. Contact your health visitor or GP as soon as possible to arrange the screening. The NHSP aims to complete all screens by the time the baby is four to five weeks old, but screening can be arranged later if it was missed. If you have any concerns about your baby`s hearing or responsiveness to sound at any age — even after a normal screening result — speak to your health visitor or GP, who can arrange a referral to paediatric audiology. Some forms of hearing loss are progressive or late-onset and may not be present at birth. Trust your instincts — you know your baby best.

Newborn hearing screening saves lives in the developmental sense. By identifying hearing loss in the first weeks of life, it gives every child the best possible chance of reaching their full potential in speech, language, education, and life. It is free, painless, and takes just a few minutes. If your baby is due or has recently been born, make sure they receive this important screen.