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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...
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...
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...
Perception of Sound Waves01:01

Perception of Sound Waves

The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...
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.

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Related Experiment Video

Updated: Jun 13, 2026

A Method to Study Adaptation to Left-Right Reversed Audition
07:14

A Method to Study Adaptation to Left-Right Reversed Audition

Published on: October 29, 2018

Behind the scenes of auditory perception.

Shihab A Shamma1, Christophe Micheyl

  • 1Department of Electrical and Computer Engineering & Institute for Systems Research, University of Maryland College Park, United States. sas@umd.edu

Current Opinion in Neurobiology
|May 12, 2010
PubMed
Summary
This summary is machine-generated.

Auditory stream formation involves both brain and subcortical processes. Recent findings highlight the roles of auditory cortex and attention in perceiving separate sound streams.

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Last Updated: Jun 13, 2026

A Method to Study Adaptation to Left-Right Reversed Audition
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Published on: October 29, 2018

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06:34

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

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Area of Science:

  • Neuroscience
  • Auditory Perception
  • Cognitive Science

Background:

  • Auditory scenes contain multiple sound sources.
  • These sources are perceived as distinct auditory streams.
  • Understanding auditory stream formation is a key challenge in auditory science.

Purpose of the Study:

  • Investigate the neural mechanisms of auditory stream formation.
  • Examine the roles of cortical and subcortical processing.
  • Clarify the influence of attention on auditory perception.

Main Methods:

  • Review of recent findings (past two years) on auditory stream formation.
  • Analysis of studies examining neural correlates.
  • Consideration of selective attention's impact.

Main Results:

  • Both cortical and subcortical neural processes contribute to auditory stream formation.
  • Primary and secondary auditory cortex areas play significant roles.
  • Relative timing of neural responses and selective attention are crucial factors.

Conclusions:

  • Auditory stream formation is a complex process involving multiple brain regions.
  • Further research is needed to fully elucidate the neural basis of auditory perception.
  • Attention significantly modulates the perception of auditory streams.