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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody

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Stress Effects in Vowel Perception as a Function of Language-Specific Vocabulary Patterns.

Natasha Warner¹, Anne Cutler

¹Department of Linguistics, University of Arizona, Tucson, Ariz., USA.

|October 7, 2016

Summary

English listeners struggle more with unstressed vowels than Dutch listeners due to differences in vowel usage. This study explores how lexical frequency impacts the perception of stressed versus unstressed vowels in spoken word recognition.

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Area of Science:

Phonetics and phonology
Psycholinguistics
Speech perception

Background:

English listeners prioritize full vs. reduced vowel distinctions, not stress on full vowels.
Dutch listeners find stress on full vowels crucial for recognition.
Lexical frequency of unstressed full vowels differs between English and Dutch.

Purpose of the Study:

Investigate how lexical differences influence vowel stress perception.
Compare stress effects on vowels in English and Dutch.

Main Methods:

Presented diphones in gated speech fragments to native listeners.
Recorded identification performance over time.
Analyzed patterns in stressed vs. unstressed vowel perception.

Main Results:

English shows significantly larger stress effects than Dutch.
Unstressed vowels are harder to identify than stressed vowels, especially in English.
Identified language-specific and shared vowel stress patterns.

Conclusions:

Larger English stress effect reflects processing demands from unstressed vowel usage.
English listeners' difficulty stems from less experience with unstressed full vowels.
Lexical characteristics shape auditory speech processing.