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Related Concept Videos

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...
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.
The Cochlea01:13

The Cochlea

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

Perceiving Loudness, Pitch, and Location

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 identifying...
Hair Cells01:22

Hair Cells

Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.

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Related Experiment Video

Updated: May 29, 2026

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
10:50

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

Published on: June 6, 2012

Implementing conditional inference in the auditory system: what matters?

Juanita Todd1, Daniel Mullens

  • 1School of Psychology, University of Newcastle, Callaghan, Australia. Juanita.Todd@newcastle.edu.au

Psychophysiology
|September 15, 2011
PubMed
Summary
This summary is machine-generated.

The auditory system can infer upcoming sound features. Reduced mismatch negativity (MMN) to linked deviant sounds suggests learned conditional inference, impacting auditory prediction dynamics.

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Area of Science:

  • Auditory Neuroscience
  • Cognitive Psychology
  • Psychoacoustics

Background:

  • The auditory system predicts upcoming sounds based on patterns.
  • Mismatch negativity (MMN) reflects auditory change detection.
  • Previous studies explored conditional inference using sound pattern deviations.

Purpose of the Study:

  • To investigate why MMN to duration deviant sounds is susceptible to conditional inference.
  • To test hypotheses explaining reduced MMN size in linked deviant sound sequences.
  • To understand the role of learned conditional inference in auditory prediction.

Main Methods:

  • Comparing MMN responses to duration and frequency glide deviant sounds.
  • Presenting deviant sounds in conditionally linked sequences versus random sequences.
  • Analyzing MMN amplitude differences between linked and random deviant sound occurrences.

Main Results:

  • MMNs to duration and frequency glide deviants were smaller in conditionally linked sequences compared to random sequences.
  • Results support the interpretation that learned conditional inference reduces MMN size.
  • The effect was significant for both duration and frequency glide deviants.

Conclusions:

  • Learned conditional inference plays a role in modulating MMN responses to deviant sounds.
  • Reduced MMN to linked deviants suggests the auditory system anticipates predictable sound features.
  • Conditional inference studies offer insights into probability-based prediction mechanisms in the auditory system.