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The Cochlea

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.

Perceiving Loudness, Pitch, and Location

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...

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Related Experiment Video

Updated: Jun 29, 2025

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

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Published on: March 24, 2023

Temporal pitch matching with bilateral cochlear implants.

Justin M Aronoff¹, Simin Soleimanifar¹, Prajna Bk¹

¹Speech and Hearing Science Department, University of Illinois at Urbana-Champaign, 901 South 6th Street, Champaign, Illinois 61820, USAjaronoff@illinois.edu, simins2@illinois.edu, prajnab2@illinois.edu.

JASA Express Letters

|April 1, 2024

Summary

This summary is machine-generated.

Bilateral cochlear implant (CI) users

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Area of Science:

Neuroscience
Audiology
Biomedical Engineering

Background:

Interaural pitch matching is crucial for bilateral cochlear implant (CI) users.
Previous research primarily focused on place-based pitch matching.
Temporal-based pitch perception in CI users remains less understood.

Purpose of the Study:

To investigate interaural temporal-based pitch matching in bilateral CI users.
To compare temporal-based pitch matching with existing place-based data.
To understand the influence of the reference ear on temporal pitch perception.

Main Methods:

Bilateral CI users participated in the study.
Participants matched amplitude modulation frequencies across ears.
Procedures were similar to those used for place-based pitch matching studies.

Main Results:

Temporal-based pitch matching was assessed in bilateral CI users.
Results were compared to prior place-based pitch matching data.
Temporal-based pitch matching demonstrated sensitivity to the reference ear choice.

Conclusions:

Interaural temporal-based pitch matching is sensitive to the reference ear.
This finding highlights the importance of temporal cues in bilateral CI hearing.
Further research is needed to fully characterize temporal pitch perception in CI users.