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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

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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...
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The Cochlea01:13

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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: Sep 1, 2025

Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
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Model-based hearing-enhancement strategies for cochlear synaptopathy pathologies.

Fotios Drakopoulos1, Viacheslav Vasilkov2, Alejandro Osses Vecchi3

  • 1Hearing Technology Lab, Department of Information Technology, Ghent University, Ghent, Belgium.

Hearing Research
|August 12, 2022
PubMed
Summary

New signal-processing strategies enhance auditory nerve coding for hearing loss, improving responses and speech clarity in individuals with cochlear synaptopathy (CS) and normal hearing. These advancements can be integrated into current hearing aids.

Keywords:
Auditory signal processingCochlear synaptopathyComputational modellingHearing aidsHearing enhancementHearing lossPeripheral codingSpeech intelligibilityTemporal-envelope processing

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Area of Science:

  • Auditory Neuroscience
  • Signal Processing
  • Audiology

Background:

  • Ageing and noise exposure cause sensorineural hearing loss, damaging inner ear structures and the auditory nerve (AN).
  • Cochlear synaptopathy (CS), or synaptic damage to the AN, is suspected in individuals with hearing difficulties but normal audiograms.
  • Current hearing aid algorithms do not address the deficits caused by CS.

Purpose of the Study:

  • To present and evaluate novel auditory signal-processing strategies aimed at restoring AN coding in listeners with CS.
  • To assess the effectiveness of these algorithms in improving physiological and behavioral markers of CS.

Main Methods:

  • Development and evaluation of advanced auditory signal-processing strategies.
  • Testing algorithms on subjects with and without suspected age-related CS.
  • Measurement of envelope-following responses, amplitude-modulation sensitivity, and speech-in-noise intelligibility.

Main Results:

  • Algorithms consistently enhanced envelope-following responses and perceptual amplitude-modulation sensitivity in all listeners.
  • Speech-in-noise intelligibility showed modest improvements, particularly in young normal-hearing participants (up to 8.3%).
  • The strategies effectively improved temporal-envelope processing for both CS and non-CS listeners.

Conclusions:

  • The developed hearing-enhancement strategies optimize auditory nerve fiber stimulation.
  • These algorithms improve auditory processing for individuals with and without suspected cochlear synaptopathy.
  • Rapid execution allows integration into current hearing aids and hearables without altering sound amplification.