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Related Concept Videos

Auditory Perception01:17

Auditory Perception

656
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...
656
Auditory Pathway01:15

Auditory Pathway

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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...
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Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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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...
518

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Related Experiment Video

Updated: Oct 13, 2025

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
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Predictability-Based Source Segregation and Sensory Deviance Detection in Auditory Aging.

Christiane R Neubert1, Alexander P Förstel2, Stefan Debener2

  • 1Cognitive Systems Lab, Faculty of Natural Sciences, Institute of Physics, Chemnitz University of Technology, Chemnitz, Germany.

Frontiers in Human Neuroscience
|November 15, 2021
PubMed
Summary
This summary is machine-generated.

Elderly adults can use predictable sounds to filter out background noise, but this ability varies greatly. Neural measures of deviance detection did not correlate with this sound segregation skill in older listeners.

Keywords:
Electroencephalography (EEG)auditory scene analysiselderly listenersforeground-background separationmismatch negativity (MMN)predictive codingtemporal processing

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Area of Science:

  • Auditory Neuroscience
  • Cognitive Psychology
  • Gerontology

Background:

  • Auditory perception struggles to separate simultaneous sounds, especially with age.
  • Predictable background sounds aid in ignoring distractors, a skill that may decline in older adults.
  • Theoretical links exist between deviance detection and age-related auditory segregation decline.

Purpose of the Study:

  • To investigate if elderly listeners use sound predictability for segregation.
  • To examine sensory deviance detection capacities in older adults.
  • To determine if deviance detection ability relates to predictability-based sound segregation.

Main Methods:

  • Combined behavioral and electroencephalography (EEG) study with listeners aged 60-75.
  • Participants performed a sound detection task with predictable vs. unpredictable distractors.
  • Event-related potentials (ERPs), including mismatch negativity (MMN), measured neural deviance detection.

Main Results:

  • Elderly listeners showed group-level benefit from predictability in sound segregation, but with high individual differences.
  • Neural signatures of deviance detection (MMN) were present at the group level.
  • No significant correlation was found between deviance detection (MMN amplitude) and the ability to benefit from predictability for sound segregation.

Conclusions:

  • Elderly individuals can utilize sound predictability for auditory scene analysis, though this capacity is highly variable.
  • Deviance detection, as measured by MMN, appears independent of the ability to exploit predictability for sound source segregation in older adults.
  • Findings suggest distinct neural mechanisms underlying sensory deviance detection and predictive coding in auditory perception in aging.