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Updated: Apr 23, 2026
06:34
Infant Auditory Processing and Event-related Brain Oscillations
Published on: July 1, 2015
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The Neural Processing of Speech Temporal Modulations During Early Phonological Development.
Monica Hegde1, Laurianne Cabrera1
1Integrative Neuroscience and Cognition Center, Université Paris Cité-CNRS, France.
Journal of Speech, Language, and Hearing Research : JSLHR
|April 22, 2026
Summary
Infants attune to native language sounds by developing auditory temporal processing skills. Six-month-olds are sensitive to fast amplitude modulation (AM) changes, while 10-month-olds focus on frequency modulation (FM) degradation.
Area of Science:
- Developmental neuroscience
- Auditory perception
- Speech processing
Background:
- Infants gradually attune to native language consonants within the first year.
- Auditory temporal processing is crucial for this early perceptual attunement.
- Understanding how infants process temporal modulations in speech is key to language acquisition.
Purpose of the Study:
- Investigate the role of auditory temporal processing in infant speech perception.
- Examine how infants process amplitude modulation (AM) and frequency modulation (FM) in speech.
- Compare auditory processing in 6-month-olds, 10-month-olds, and adults.
Main Methods:
- Used electrophysiological measures (Cortical Auditory Evoked Potentials - CAEPs).
- Measured CAEPs for native and nonnative consonants under degraded and preserved AM/FM conditions.
- Included French-learning infants (6 and 10 months) and a young adult reference group.
Main Results:
- Temporal degradation affected CAEPs differently across infant age groups.
- Six-month-olds showed heightened sensitivity to the reduction of fast AM cues (> 8 Hz).
- 10-month-olds were more sensitive to FM degradation.
Conclusions:
- Infant auditory responses to speech temporal cues are shaped by age.
- Auditory processing mechanisms for FM and AM cues are still developing in infancy.
- Adults did not exhibit the same sensitivity patterns, indicating continued development beyond infancy.
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