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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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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.
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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.
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The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
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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.
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Updated: Mar 24, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Own-Voice Perception with Different Processing Delays in Open-Fit Hearing Aids.

Borgný Súsonnudóttir1,2,3, Lars D Mosgaard3, Georg Stiefenhofer4

  • 1Department of Clinical Research, University of Southern Denmark, Odense, Denmark.

Trends in Hearing
|March 23, 2026
PubMed
Summary

The shortest processing delay (0.5 ms) in open-fit hearing aids (HAs) was preferred, improving own-voice perception and reducing coloration. Spectral discrimination did not predict this preference.

Keywords:
Hearing aidscomb-filteringfrequency resolutionsound quality

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Area of Science:

  • Audiology
  • Acoustics
  • Psychoacoustics

Background:

  • Open-fit hearing aids (HAs) can cause coloration due to sound interactions.
  • Own-voice perception is crucial for HA user acceptance.
  • Processing delay significantly impacts perceived sound quality.

Purpose of the Study:

  • To determine if shorter processing delays are preferred in open-fit HAs.
  • To investigate the effect of processing delay on own-voice perception dimensions.
  • To assess if spectral discrimination predicts delay preference.

Main Methods:

  • Twenty-four participants with mild-to-moderate hearing impairment used prototype receiver-in-the-canal HAs.
  • Processing delays of 0.5, 5, and 10 ms were compared using paired-comparison tasks.
  • Own-voice perception was evaluated using a questionnaire, and spectral discrimination was assessed via an SRD task.

Main Results:

  • The 0.5 ms processing delay was significantly preferred over longer delays.
  • Shorter delays (0.5 ms) resulted in better ratings for tonality and own-voice quality compared to 10 ms.
  • Spectral discrimination abilities did not predict the preference for shorter delays.

Conclusions:

  • Optimizing processing delay is key for improving own-voice perception in open-fit HAs.
  • A processing delay of 0.5 ms offers a better perceptual outcome for users.
  • Further research can explore other factors influencing HA sound quality.