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Related Concept Videos

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.
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.
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...
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.
Anatomy of the Ear01:16

Anatomy of the Ear

Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...

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Related Experiment Video

Updated: Jun 6, 2026

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners
07:52

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

Published on: March 13, 2026

Adaptive sound localization with a silicon cochlea pair.

Vincent Yue-Sek Chan1, Craig T Jin, André van Schaik

  • 1School of Electrical and Information Engineering, The University of Sydney Sydney, NSW, Australia.

Frontiers in Neuroscience
|December 15, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a neuromorphic sound localization system using silicon cochleae and neural networks. The adaptive system achieves accurate sound source localization with an average error of 3° for auditory research.

Keywords:
neuromorphic engineeringonline learningsilicon cochleasound localization

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Last Updated: Jun 6, 2026

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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

Area of Science:

  • Neuroscience and Engineering
  • Biologically Inspired Computing
  • Auditory Signal Processing

Background:

  • Traditional sound localization systems often lack adaptability and robustness to environmental changes.
  • Neuromorphic engineering offers bio-inspired solutions for complex sensory processing tasks.

Purpose of the Study:

  • To develop and evaluate an adaptive neuromorphic system for precise sound localization.
  • To leverage silicon cochleae and neural networks for efficient auditory processing.

Main Methods:

  • Utilized a two-microphone setup with silicon cochleae and an address event interface for front-end processing.
  • Extracted interaural time differences and employed soft-winner-takes-all networks for timing preservation.
  • Integrated a neural network for estimating auditory activity across various bearing positions.

Main Results:

  • The neuromorphic system demonstrated accurate sound localization capabilities for far-field sources.
  • Achieved an average localization error of approximately 3° within a -45° to 45° range.
  • The adaptive algorithm supported online learning, compensating for circuit mismatch and environmental variations.

Conclusions:

  • The proposed neuromorphic sound localization system is effective and adaptable.
  • The system shows promise for applications requiring robust and precise auditory spatial awareness.