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Related Concept Videos

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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...
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Related Experiment Video

Updated: Apr 16, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Will diminishing cochlear delay affect speech perception in noise?

Ethan I Huang1, John D Durrant, J Robert Boston

  • 1* Department of Communication Science and Disorders, University of Pittsburgh , Pennsylvania , USA.

International Journal of Audiology
|March 5, 2015
PubMed
Summary
This summary is machine-generated.

This study investigated cochlear delays and speech recognition. Perturbing these delays did not significantly impact word recognition in normal-hearing listeners, though some trends suggest potential effects.

Keywords:
Cochlear delaydigital hearing instrumentsspeech recognition in noise

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Area of Science:

  • Auditory Neuroscience
  • Speech Perception
  • Signal Processing

Background:

  • The auditory system naturally processes frequency information with inherent time/phase delays from the cochlea.
  • These cochlear delays are critical for auditory processing, and their perturbation may impact speech recognition.

Purpose of the Study:

  • To investigate the impact of diminishing or nullifying cochlear delays on speech recognition ability.
  • To examine this effect on a timescale relevant to empirically demonstrated cochlear delays.

Main Methods:

  • A randomized controlled trial tested word recognition using digitally processed speech tokens.
  • Speech tokens were manipulated to alter cochlear delays (exacerbated, diminished/nullified).
  • Listening conditions included speech-weighted noise with time-frequency reversed (no delay) versus non-reversed (natural timing) transforms.

Main Results:

  • No statistically significant differences in word recognition were found between delay conditions across all speech token treatments.
  • The algorithm designed to diminish cochlear delays did not systematically impair performance in all participants.

Conclusions:

  • Perturbing frequency-dependent cochlear delays did not consistently degrade speech recognition under the tested conditions.
  • Emerging trends suggest that altering cochlear delays might have subtle effects that warrant further investigation.