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Related Concept Videos

Hearing01:31

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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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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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The Auditory Ossicles01:11

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The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
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The Cochlea01:13

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Related Experiment Video

Updated: Nov 3, 2025

Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation
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Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation

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Cartilage Conduction Hearing Aid Fitting in Clinical Practice.

Tadashi Nishimura1, Hiroshi Hosoi2, Tomoko Sugiuchi3

  • 1Department of Otolaryngology-Head and Neck Surgery, Nara Medical University, Kashihara, Nara, Japan.

Journal of the American Academy of Audiology
|June 3, 2021
PubMed
Summary

Cartilage conduction hearing aids (CCHAs) show high purchase rates in patients with closed ears and otorrhea. These hearing aids are a viable option for individuals experiencing difficulties with traditional air conduction hearing aids (ACHAs).

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Area of Science:

  • Audiology
  • Biomedical Engineering
  • Otorhinolaryngology

Background:

  • Cartilage conduction hearing aids (CCHAs) have rapidly gained popularity in Japan since their 2017 introduction.
  • Limited existing research necessitates a comprehensive understanding of CCHA efficacy and indications.

Purpose of the Study:

  • To establish foundational knowledge regarding CCHAs.
  • To propose appropriate clinical indications for CCHA use.

Main Methods:

  • A correlational study involving 256 patients across nine institutions.
  • Audiometric assessments and clinical characteristic comparisons were conducted.
  • Patients were categorized into seven groups based on ear conditions.

Main Results:

  • High purchase rates and significant benefits were observed in patients with bilateral or unilateral closed ears.
  • Patients with bilateral continuous otorrhea also showed high purchase rates.
  • Lower purchase rates were noted in patients who could effectively use air conduction hearing aids (ACHAs).

Conclusions:

  • CCHAs are a beneficial option for patients with closed ear conditions.
  • CCHAs offer an alternative for individuals facing challenges with conventional ACHAs.