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Related Concept Videos

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...
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.
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...
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 18, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
06:04

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

Published on: March 24, 2023

Temporal feature perception in cochlear implant users.

Lydia Timm1, Deepashri Agrawal, Filipa C Viola

  • 1Department of Neurology, Hannover Medical School, Hannover, Germany. timm.lydia@mh-hannover.de

Plos One
|October 3, 2012
PubMed
Summary
This summary is machine-generated.

Cochlear implant (CI) users show altered auditory evoked potentials (AEPs) when processing musical sound onsets. This suggests that impaired timbre perception in CI users may stem from difficulties in detecting early sound features.

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Area of Science:

  • Auditory Neuroscience
  • Music Perception
  • Neuroscience

Background:

  • Timbre perception in music relies heavily on sound onset information (first 50-150 ms).
  • Auditory processing and music perception are often impaired in cochlear implant (CI) users.

Purpose of the Study:

  • To investigate the detection of subtle differences in musical sound onset processing in CI users compared to normal-hearing (NH) controls.
  • To evaluate auditory evoked potentials (AEPs) in response to manipulated cornet sound onsets.

Main Methods:

  • An electroencephalography (EEG) study using an oddball paradigm.
  • Manipulation of the initial 60 ms of cornet sound onsets.
  • Analysis of auditory evoked potentials (AEPs), including N1, P2, and Mismatch Negativity (MMN).

Main Results:

  • Significant differences in N1 latency and P2 amplitude/latency were observed between CI users and NH controls for onset manipulations.
  • A Mismatch Negativity (MMN) response was only elicited in the NH control group.
  • Musical training appeared to influence AEPs in CI users.

Conclusions:

  • CI users exhibit altered neural processing of early sound onset features compared to NH individuals.
  • Impaired timbre perception in CI users may be partly attributed to deficits in sound onset feature detection.
  • AEPs, particularly N1 and P2 components, reflect differences in onset processing between groups.