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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Consistency in phonetic categorization predicts successful speech-in-noise perception
Rose Rizzi1,2, Gavin M Bidelman1,2,3
1Department of Speech, Language and Hearing Sciences, Indiana University, Bloomington, Indiana 47408, USA.
JASA Express Letters
|December 10, 2025
Summary
Listeners
Area of Science:
- Auditory perception
- Speech processing
- Cognitive psychology
Background:
- Listeners categorize continuous speech signals into phonetic categories.
- Individual differences exist in categorization consistency and discreteness.
- The relationship between perceptual categorization, cognitive factors, and speech-in-noise (SIN) perception remains unclear.
Purpose of the Study:
- To investigate how perceptual gradiency and response consistency predict speech-in-noise (SIN) performance.
- To examine the collective influence of perceptual factors and working memory on SIN perception.
Main Methods:
- Listeners' perceptual gradiency and response consistency were estimated during vowel labeling tasks.
- Working memory capacity and SIN performance were assessed.
Main Results:
- Perceptual consistency and working memory emerged as the strongest predictors of SIN scores.
- Perceptual consistency was more important than categoricity for understanding noise-degraded speech.
Conclusions:
- Perceptual consistency is crucial for effective speech-in-noise perception.
- Working memory also plays a significant role in auditory perception in noisy environments.
- Future research should focus on perceptual consistency for improving SIN performance.
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