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Related Concept Videos

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.
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.
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 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...
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...

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Related Experiment Video

Updated: Jul 25, 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

Auditory/phonetic categorization with the Symbion multichannel cochlear implant.

M F Dorman1, M T Hannley, G A McCandless

  • 1Arizona State University, Tempe 85287.

The Journal of the Acoustical Society of America
|August 1, 1988
PubMed
Summary

This study details the phonetic identification abilities of a cochlear implant patient. Findings suggest simple speech processing strategies and electrode design are effective for cochlear prostheses.

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Related Experiment Videos

Last Updated: Jul 25, 2026

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
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Published on: June 6, 2012

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Published on: June 16, 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

Area of Science:

  • Audiology
  • Speech Science
  • Biomedical Engineering

Background:

  • Cochlear implants are crucial for restoring hearing in individuals with severe hearing loss.
  • Understanding speech is a primary goal for cochlear implant users.
  • The Symbion four-channel cochlear implant represents a specific technology for auditory rehabilitation.

Observation:

  • The study focuses on an individual (SS) with exceptional speech understanding using the Symbion four-channel cochlear implant.
  • SS's phonetic identification abilities were assessed to understand their speech perception mechanisms.
  • The research examines how SS utilizes various acoustic cues for speech sound categorization.

Findings:

  • SS effectively uses signal duration and spectral cues for phonetic categorization, mirroring normal hearing listeners.
  • Identification of vowel sounds by SS involves both F1 and higher formants.
  • SS identifies stop consonant place of articulation using burst frequency and abrupt frequency changes, but struggles with formant transitions.

Implications:

  • The findings support the viability of simple speech processing strategies, like four-band filtering, for cochlear prostheses.
  • Monopolar electrode design is suggested as a practical option based on SS's performance.
  • This research contributes to optimizing cochlear implant design for improved speech understanding.