Developmental Changes in Speech Frequency Weighting in Children.
A K Bosen, A Frenette, M Spratford and 3 others
PMID 41199448WHAT IT FOUND
Children aged 6 to 13 years rely increasingly on high-frequency speech cues as they mature, with importance weights for 2000 and 4000 Hz bands rising with age.
Standard adult-based models overestimate children's speech access, suggesting clinical predictions need age-specific adjustments.
Key findings
01The importance weight of the 250 Hz band decreased with increasing age, while the importance of the 2000 and 4000 Hz bands increased with increasing age.
02Recognition accuracy for filtered nonwords and words increased with age, with correlation coefficients of 0.62 for nonwords and 0.68 for words.
03Metrics of speech audibility based on adult perception, such as the Speech Intelligibility Index, overestimate the speech information children have access to and thus overestimate their recognition accuracy.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study only included children with normal hearing, so it is unclear if these frequency weighting patterns apply to children with hearing loss or hearing aids. The cognitive measures used (vocabulary and attention tasks) did not explain the age-related changes in frequency weighting, suggesting the underlying mechanism remains unidentified. The study was cross-sectional, comparing different children at different ages rather than following the same children over time.
Declared interests
The authors have no conflicts of interest to disclose.
The easy way to misread this
Do not assume that adult Speech Intelligibility Index (SII) calculations accurately reflect a child's access to speech information. The study shows that children's reliance on specific frequency bands changes with age, meaning standard models may overestimate what a child can actually hear and understand.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →