Related Experiment Video
Updated: Oct 14, 2025
06:42
Conducting Hyperscanning Experiments with Functional Near-Infrared Spectroscopy
Published on: January 19, 2019
10.5K
Binding the Acoustic Features of an Auditory Source through Temporal Coherence.
Mohsen Rezaeizadeh1, Shihab Shamma1
1Department of Electrical and Computer Engineering and Institute for Systems Research, University of Maryland, College Park 20742, USA.
Cerebral Cortex Communications
|November 8, 2021
Summary
Temporal coherence in brain responses binds attended sound features, enabling auditory scene segregation. This binding occurs regardless of sound characteristics, highlighting its crucial role in organizing complex auditory information.
Area of Science:
- Auditory neuroscience
- Cognitive psychology
- Signal processing
Background:
- Auditory perception relies on segregating target sounds from background noise.
- The temporal coherence hypothesis suggests neural responses must correlate for sound segregation.
Purpose of the Study:
- To investigate the role of temporal coherence in auditory scene analysis.
- To test the hypothesis that neural binding of sound features depends on temporal coherence.
Main Methods:
- Electroencephalography (EEG) measurements in human subjects.
- Sound segregation tasks involving complex acoustic mixtures.
- Analysis of neural response modulation and inter-feature correlations.
Main Results:
- EEG data demonstrated rapid neural binding of temporally coherent sound features.
- Binding occurred irrespective of feature identity, harmonic relationship, or frequency separation.
- Temporally incoherent features showed reduced neural activity due to suppressive interactions.
Conclusions:
- Temporal coherence is a key mechanism for binding attended auditory features.
- This neural binding facilitates the segregation and organization of auditory scenes.
- The findings support the temporal coherence hypothesis in auditory perception.
More Related Videos
Related Concept Videos
01:31Hearing
53.9K
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
53.9K
01:17Auditory Perception
657
The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
657
01:13The Cochlea
47.1K
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
47.1K
01:15Auditory Pathway
6.0K
Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
6.0K
01:06Echo
644
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
644
01:21Perceiving Loudness, Pitch, and Location
536
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
536