Electric acoustic stimulation
Electric Acoustic Stimulation (EAS)[edit | edit source]
Electric Acoustic Stimulation (EAS) is a hearing technology that combines cochlear implants and hearing aids to assist individuals with hearing loss. This hybrid approach is particularly beneficial for those with residual low-frequency hearing but significant high-frequency hearing loss.
Overview[edit | edit source]
EAS systems are designed to provide acoustic amplification for low-frequency sounds and electric stimulation for high-frequency sounds. This dual approach allows users to benefit from the natural sound quality of acoustic hearing while also gaining access to the high-frequency sounds that are typically lost in individuals with severe to profound hearing loss.
Components[edit | edit source]
The EAS system consists of two main components:
- Acoustic Component: This part functions like a traditional hearing aid, amplifying low-frequency sounds. It is typically worn behind the ear and delivers sound through an ear mold.
- Electric Component: This part involves a cochlear implant, which bypasses damaged hair cells in the cochlea and directly stimulates the auditory nerve. The implant consists of an external processor and an internal electrode array.
Indications[edit | edit source]
EAS is indicated for individuals who have:
- Residual low-frequency hearing that can benefit from acoustic amplification.
- Severe to profound high-frequency hearing loss that requires electric stimulation.
- Difficulty understanding speech, especially in noisy environments.
Benefits[edit | edit source]
The benefits of EAS include:
- Improved speech understanding in both quiet and noisy environments.
- Enhanced music appreciation due to the preservation of low-frequency hearing.
- Better sound localization and spatial hearing.
Limitations[edit | edit source]
While EAS offers significant advantages, there are limitations:
- Not suitable for individuals with no residual hearing.
- Requires surgical implantation of the cochlear implant component.
- Regular maintenance and programming adjustments are necessary.
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