Can frequent ear infections delay a child’s speech development?

The AAO-HNS recommends informing families about the potential effect of conductive hearing loss associated with otitis media with effusion (OME) on the child’s speech and language development, especially with bilateral and long-lasting effusion. ^[1]

Degree of hearing loss in OME

OME impairs sound conduction by reducing the mobility of the eardrum and the ossicles. Hearing loss ranges from normal to moderate hearing loss (0–55 dB). The average hearing loss in OME is 28 dB, and about 20% of children have thresholds above 35 dB. Children aged 6–11 with hearing thresholds of 15–30 dB already show significantly lower cognitive, language and reading skills than children with better hearing. ^[1][2]

Effect on speech and language: what is known

The effect of hearing loss in OME on communication development depends on several factors: severity, laterality, duration and age at detection. Environmental factors (the amount of language stimulation at home, quality of care) also modulate the effect. ^[1]

A systematic review found no link between OME in the first 3 years of life and later receptive or expressive language, but this review assessed OME as such rather than the degree of hearing loss. Other systematic reviews found at most a small negative effect of OME and hearing loss on receptive and expressive language up to primary school. Any effect of hearing loss in OME on speech development in typically developing children is amplified in at-risk children (developmental delay, Down syndrome, cleft palate, ASD and others). ^[1]

Red flags for speech and language delay (for counseling parents): ^[1]

• Signs of speech (articulation) delay — no babbling with consonants (b, m, d, n) by 9 months; mostly vowel sounds and gestures after 18 months; speech hard to understand at age 3; frequent omission/addition of consonants at age 3; inability to pronounce most sounds by age 5–6; short or clearly incorrect sentences at age 4
• Signs of language delay — no single words by 16–18 months; inability to follow simple instructions or point to body parts by 18 months; no 3–4 word phrases by age 2; no full sentences by age 3

Ear tubes and speech outcomes

Overall, RCTs found no significant effect of tympanostomy on speech, language or cognitive outcomes, but these studies mainly included healthy children without developmental delay. A non-randomized study showed that parents perceived improved speech and language after tube placement, especially in children with developmental delay. ^[2]

The main proven benefits of ear tubes are a 32% drop in the first year in the prevalence of effusion and a 5–12 dB improvement in hearing (short term), as well as better quality of life for the child and the family. ^[2]

Indications for ear tubes depending on hearing: ^[2]

• Normal hearing (<15 dB) → assess symptoms; if observing, repeat audiometry in 3–6 months
• Mild hearing loss (16–40 dB) + bilateral OME for 3 months or more → offer bilateral tympanostomy
• Moderate hearing loss (>40 dB) → the child is at risk of speech and academic problems; tympanostomy is recommended

II. How OME affects speech development

The link between recurrent otitis media with effusion and speech delay works through conductive hearing loss — fluctuating, often asymmetric, and occurring during the critical period when the auditory pathways are forming. ^[3][4]

The pathophysiological chain:

• Middle ear effusion → reduced eardrum mobility → conductive hearing loss (28 dB on average, up to 55 dB) ^[1][2]
• Fluctuating and asymmetric hearing loss → the central auditory nervous system receives incomplete, inconsistent and different information from the right and left ears ^[3]
• Impaired maturation of the central auditory pathways → reduced ability to analyze and interpret auditory stimuli, especially in noise ^[3][5]
• Impaired phonological sensitivity (the ability to distinguish and manipulate speech sounds) — more pronounced than the effect on vocabulary ^[4]

The study by Nittrouer & Lowenstein (2024, n=117 children aged 5–10) showed that children with a history of AOM performed significantly worse on tests of auditory temporal modulation and phonological sensitivity. The temporal modulation deficit explained variation in phonological sensitivity but not in vocabulary, pointing to two different mechanisms: through impaired auditory development (phonology) and through limited access to the speech environment (vocabulary). ^[4]

Long-term consequences for central auditory processing

Colella-Santos et al. (2018) showed that children with a history of recurrent secretory otitis have lower scores on both behavioral tests of central auditory processing and long-latency auditory evoked potentials. A child with 3–4 episodes of OME may have up to 12 months of cumulative conductive hearing loss during a critical period of development. ^[3]

Khalaila-Zbidat et al. (2026, n=55 children aged 6–8) found that children with a history of OME had reduced amplitudes of frequency-following responses (FFR) in quiet but earlier latencies in noise, which points to compensatory neuroplasticity. These children also relied more on working memory to perceive speech in noise. ^[5]

III. Data from cohort studies

The prospective COPSAC2010 cohort study (Thorsen et al., 2023, n=663) showed: ^[6]

• Children with OME had significantly lower word production at 1 year (median 2 vs 4 words, p=0.017) and lower word comprehension (median 36 vs 47, p=0.03)
• By age 2 the differences in word production had leveled out
• By age 3 the overall developmental score did not differ between the groups
• Children with tympanostomy tubes had a lower cognitive score at 2.5 years (−2.34; 95% CI −4.56 to −0.12), but this may reflect confounding by indication (tubes were placed in children with a more severe course)

IV. Does early tympanostomy affect speech outcomes?

The Cochrane review by MacKeith et al. (2023) compared early tympanostomy with watchful waiting and found no clinically meaningful differences in expressive and receptive language skills, cognitive development or psychosocial outcomes. However, the certainty of the evidence was rated as very low. ^[7]

Important caveats:

• The RCTs included typically developing children — the results cannot be extrapolated to at-risk children ^[2]
• The studies assessed the effect of OME as such, not the degree of hearing loss — this may mask the real effect ^[1]
• A high rate of “crossover” (children in the control group received tubes during follow-up) reduces the power of the comparison ^[7]

V. Practical recommendations

So the link between recurrent otitis with effusion and speech delay exists but is moderate in typically developing children and is considerably stronger in at-risk children. The key factor is not so much OME itself as the degree and duration of the associated hearing loss. Tympanostomy improves hearing in the short term, but its effect on long-term speech outcomes in healthy children remains uncertain.