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Related Concept Videos

Auditory Perception01:17

Auditory Perception

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 cochlea, a...
Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

Improving short-term memory can be achieved through techniques like chunking and rehearsal. Chunking involves organizing information into larger, more manageable units. This technique is particularly useful for information that exceeds the typical memory span of between five and nine items. For instance, logging into an online account with a password like "ta89vq0179gz" involves grouping letters and numbers into three chunks—ta89, vq01, and 79gz. It makes large amounts of information more...
Hearing01:31

Hearing

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.
Auditory Pathway01:15

Auditory Pathway

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 the...

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Related Experiment Video

Updated: Jul 4, 2026

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
11:39

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

Published on: September 7, 2022

Enhanced Time-Locked Decoding for Spoken Words but Not Environmental Sounds in Natural-Like Auditory Conditions.

Jesper Edström1,2, Anni Nora1, Oona Rinkinen1

  • 1Department of Neuroscience and Biomedical Engineering, Aalto University, Espoo, Finland.

The European Journal of Neuroscience
|July 3, 2026
PubMed
Summary

The human brain, particularly the left hemisphere, uniquely processes speech sounds using time-locked neural activity, even when competing with environmental sounds. This special tracking aids speech comprehension in noisy conditions.

Keywords:
auditory attentionmagnetoencephalographyspeech processingstimulus reconstruction

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Related Experiment Videos

Last Updated: Jul 4, 2026

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
11:39

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Published on: September 7, 2022

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

Infant Auditory Processing and Event-related Brain Oscillations
06:34

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

Area of Science:

  • Neuroscience
  • Auditory Perception
  • Cognitive Science

Background:

  • Humans excel at understanding speech in complex auditory environments.
  • The brain's method for distinguishing speech from other sounds in noise is not fully understood.
  • Previous research highlights time-locked cortical activity for speech feature encoding.

Purpose of the Study:

  • To investigate if speech is processed differently from nonspeech sounds during concurrent auditory perception.
  • To determine if a time-locking mechanism is employed for speech encoding amidst competing sounds.
  • To explore the role of attention in modulating neural processing of speech versus nonspeech sounds.

Main Methods:

  • Magnetoencephalography (MEG) recordings were used to capture brain activity.
  • A machine learning-based time-locked decoding model was applied.
  • Participants listened to superimposed speech and environmental sounds, attending to one stream at a time.

Main Results:

  • The left hemisphere showed significantly better decoding of speech sound envelopes compared to environmental sound envelopes (120-200 ms latency).
  • No significant difference in decoding was observed between sound types in the right hemisphere.
  • Attention enhanced speech sound decoding in the left hemisphere, indicating both bottom-up and top-down influences.

Conclusions:

  • The left hemisphere employs a specialized, time-locked processing mechanism for speech, even in challenging acoustic conditions.
  • This distinct speech processing mechanism likely supports efficient extraction of acoustic-phonetic features.
  • The findings suggest shared neural underpinnings with previously identified time-locked tracking mechanisms for speech amplitude envelopes.