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# Hearing loss in children and language development

- Topic

A child who does not hear well cannot learn to speak well; finding hearing loss early and treating it protects language and school.

Updated Nov 5, 2026

## Key points

- Benchmarks 1-3-6: screening by 1 month, full audiological diagnosis by 3 months, early intervention by 6 months.
- About half of hearing loss in babies is genetic (one third of those as part of a syndrome); about a quarter is due to infections in pregnancy, complications after birth or head injury (CDC).
- WHO estimates that nearly 60% of childhood hearing loss is due to preventable causes (rubella, cytomegalovirus, meningitis, otitis media, ototoxic drugs, neonatal jaundice).
- Otitis media with effusion is the main cause of conductive loss in children; sensorineural loss is the main cause of permanent loss.
- Unilateral hearing loss also matters: it impairs hearing in noise, is linked to school failure and can progress.

## What it is

Hearing loss affects about 1 to 3 per 1,000 newborns and becomes more frequent through childhood. It can be congenital (genetic, or from infections in pregnancy) or acquired (meningitis, otitis media, ototoxic drugs, noise, trauma). Because language develops in critical periods, especially in the first three years, the goal is screening by 1 month, diagnosis by 3 months and intervention by 6 months. Many causes are preventable.

## Key facts

- Warning signs in babies: no startle to loud sounds, not turning to sound after 6 months, no single words such as «mama» by 1 year.
- Warning signs in older children: delayed or unclear speech, not following directions, often saying «what?», turning the volume up.
- Language milestones: babbling by 4–6 months, one or two words by 1 year, two-word phrases by 2 years, four-word sentences by 3–4 years.
- Children at risk of late-onset or progressive loss (for example after congenital cytomegalovirus or meningitis) need at least one hearing test by about 2 to 2½ years even if the newborn screen was passed.
- Severity by threshold: normal 0–20 dB, mild 20–39, moderate 40–69, severe 70–89, profound 90 or more.

## Congenital versus acquired hearing loss

| Type | Causes | Clues |
| --- | --- | --- |
| Congenital genetic | Non-syndromic genes; syndromes such as Down or Usher | Family history, ear or face anomalies |
| Congenital infection | Cytomegalovirus, rubella | Failed newborn screen; may also be late-onset or progressive |
| Perinatal | Asphyxia, severe jaundice, low birth weight, intensive care stay | Risk factors from the neonatal history |
| Acquired in childhood | Meningitis, chronic otitis media, ototoxic drugs, noise, head trauma, earwax | Loss of previously normal hearing or speech regression |

## In clinical practice

- Passing the newborn screen does not exclude later hearing loss: any parental concern deserves a hearing test at any age.
- Every child with speech or language delay needs a hearing test before other explanations are accepted.
- Rehabilitation includes hearing aids or cochlear implants, speech and language therapy, sign language and school support, chosen with the family.

## Next step / Initial management

- Confirm the newborn hearing screening result; if not done or not passed, arrange the test without delay.
- Ask about risk factors (family history, intensive care stay, congenital infection, meningitis, ototoxic drugs) and check language milestones at every visit.
- Look for and treat otitis media with effusion and earwax; a conductive cause does not exclude a permanent loss.
- Refer urgently (within days) to audiology and paediatric otolaryngology a baby who failed the screen, a child with sudden loss, or loss after meningitis.
- Refer on a routine but prompt basis any child with language delay, parental concern or risk factors for audiological evaluation and speech therapy.

## Test yourself

Think of the answer, then tap the question to see it.

## What do the 1-3-6 benchmarks of newborn hearing programmes mean?

Screening by 1 month of age, full audiological diagnosis by 3 months and enrolment in early intervention by 6 months.

## A 2-year-old says only a few single words. What test comes before other explanations?

A formal hearing test (audiological evaluation), because hearing loss is a treatable cause of language delay.

## Which congenital infection is a leading non-genetic cause of hearing loss that may appear after a normal newborn screen?

Congenital cytomegalovirus infection; children at risk need repeated hearing tests even if the first screen was passed.

## What is the most common cause of conductive hearing loss in children?

Otitis media with effusion (fluid in the middle ear, «glue ear»).

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## Elsewhere in DurgiPedia

- [Congenital hearing loss, microtia and preauricular pits](https://durgical.com/en/embryology/congenital-hearing-loss-microtia-and-preauricular-pits/)

## Connections

## Related 2

- [Newborn hearing screening in Colombia](https://durgical.com/en/ent/newborn-hearing-screening-in-colombia/)
- [Otitis media in children: watchful waiting and ear tubes](https://durgical.com/en/ent/otitis-media-in-children-watchful-waiting-and-ear-tubes/)

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Educational content; it does not replace a medical assessment and is not a clinical instruction. For a real case, follow current guidelines and specialist advice.

Sources: [About Hearing Loss in Children](https://www.cdc.gov/hearing-loss-children/about/index.html) (Centers for Disease Control and Prevention (CDC), 2024); [Screening for Hearing Loss](https://www.cdc.gov/hearing-loss-children/screening/index.html) (Centers for Disease Control and Prevention (CDC), 2024); [Deafness and hearing loss (fact sheet)](https://www.who.int/news-room/fact-sheets/detail/deafness-and-hearing-loss) (World Health Organization, 2026); [Speech and Language Developmental Milestones](https://www.nidcd.nih.gov/health/speech-and-language) (National Institute on Deafness and Other Communication Disorders (NIDCD), 2022); [Hearing Loss Assessment in Children](https://www.ncbi.nlm.nih.gov/books/NBK580492/) (StatPearls (NCBI Bookshelf), 2026); [Pediatric Hearing Loss](https://www.ncbi.nlm.nih.gov/books/NBK538285/) (StatPearls (NCBI Bookshelf), 2023).

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License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/ent/hearing-loss-in-children-and-language-development/