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Related Concept Videos

Hearing01:31

Hearing

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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 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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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Classification of Follow-up Rehabilitation ("AHB") in the Context of Postoperative Cochlear Implant (CI) Care.

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Recommendations for selection of target parameters and process recommendations for audiological and technical functional testing of cochlear implant : Prepared by the ERA consortium (AG-ERA) of ADANO in cooperation with the Implantable Hearing Systems expert committee of the DGA. Confirmed by the board of ADANO on 31.01.2025.

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[Recommendations for selection of target parameters and process recommendations for audiological and technical functional testing of cochlear implant : Prepared by the ERA consortium (AG-ERA) of ADANO in cooperation with the Implantable Hearing Systems expert committee of the DGA. Confirmed by the board of ADANO on 31.01.2025. German version].

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Related Experiment Video

Updated: Apr 30, 2026

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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[Hearing preservation: Better hearing with advanced technology].

T Rader1, S Helbig1, T Stöver1

  • 1Klinik für HNO-Heilkunde, Audiologische Akustik, Goethe-Universität Frankfurt am Main.

Laryngo- Rhino- Otologie
|May 1, 2014
PubMed
Summary

Cochlear implantation with electric and acoustic stimulation (EAS) preserves residual hearing, improving speech understanding, especially in noisy environments. This technique benefits individuals with high-frequency hearing loss and some low-frequency hearing.

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Area of Science:

  • Otolaryngology
  • Audiology
  • Biomedical Engineering

Context:

  • Cochlear implantation techniques are evolving to preserve residual hearing.
  • Electric and Acoustic Stimulation (EAS) combines electrical stimulation with acoustic preservation.
  • This approach is suitable for specific hearing loss profiles.

Purpose:

  • To describe the benefits of preserving residual hearing during cochlear implantation.
  • To highlight the advantages of electric and acoustic stimulation (EAS) for speech comprehension.
  • To introduce specialized devices for hearing preservation and EAS.

Summary:

  • Preserving residual hearing via specialized cochlear implantation techniques allows for combined electric and acoustic stimulation (EAS).
  • EAS enhances speech understanding, particularly in noisy conditions, by leveraging both electrical and acoustic inputs.
  • This method is indicated for patients with profound high-frequency hearing loss and mild low-frequency loss, with manufacturers providing tailored electrodes and processors.

Impact:

  • Improved speech perception in challenging listening situations for cochlear implant users.
  • Enhanced quality of life for individuals with specific patterns of hearing loss.
  • Advancement in hearing restoration technologies through combined stimulation modalities.