Dominant mid-to-high-frequency harmonics predict neural encoding and perception of concurrent vowels with large f0 differences

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Neural encoding of vowels with large f0 differences reveals insights into speech streaming, suggesting dominant harmonics play a key role.

Neural encoding of vowels improves with speech streaming that relies on fundamental frequency differences.
Results indicate neural channel selection was affected by competing vowel identities and their frequency features.
This assessment applied frequency following responses to analyze subcortical encoding of vowel mixtures.
Findings suggest that neural processing of vowels relies on dominant harmonics for effective streaming of speech.

Cheng et al. (2025) studied this question.

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Neural encoding of vowels with large f0 differences reveals insights into speech streaming, suggesting dominant harmonics play a key role.