Electric acoustic stimulation

Electric acoustic stimulation (EAS) is the use of a hearing aid and a cochlear implant technology together in the same ear. EAS is intended for people with high-frequency hearing loss, who can hear low-pitched sounds but not high-pitched ones. The hearing aid acoustically amplifies low-frequency sounds, while the cochlear implant electrically stimulates the middle- and high-frequency sounds. The inner ear then processes the acoustic and electric stimuli simultaneously, to give the patient the perception of sound.

In several clinical studies, EAS has proven to yield superior results compared to partially deaf patients who use only hearing aids. In order to achieve these results, it is vital to preserve the patient's residual hearing in the low frequencies.

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