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Updated: Jan 15, 2026
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Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception
Published on: August 9, 2024
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Joint Population Coding and Temporal Coherence Link an Attended Talker's Voice and Location Features in Naturalistic
Kiki van der Heijden1,2,3, Prachi Patel2,4, Stephan Bickel5,6
1Donders Institute for Brain, Cognition and Behavior, Radboud University, Nijmegen 6525 GD, Netherlands.
Summary
The human auditory cortex integrates sound features like voice and location using joint population coding and temporal coherence. Selective attention enhances this integration, linking attended sound streams for better auditory object formation.
Area of Science:
- Neuroscience
- Auditory Perception
- Cognitive Science
Background:
- Listeners can extract multi-dimensional auditory objects from complex acoustic scenes.
- Neural mechanisms for simultaneous encoding and linking of sound features (voice, location) are not fully understood.
Purpose of the Study:
- Investigate how the human auditory cortex processes and integrates voice and location features.
- Examine the role of attentional mechanisms in modulating feature integration during multi-talker scenes.
Main Methods:
- Invasive intracranial recordings in seven neurosurgical patients.
- Analysis of neural responses during naturalistic multi-talker auditory scenes.
Main Results:
- Cortical sites showed a continuum of sensitivity: single-feature (voice or location) to dual-feature.
- Neural populations jointly encoded attended talker's voice and location.
- Attention enhanced temporal coherence between voice- and location-sensitive sites.
Conclusions:
- Two complementary mechanisms, joint population coding and temporal coherence, enable voice and location feature integration.
- Selective attention links auditory features, supporting auditory object formation in complex environments.
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