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Electric acoustic stimulation (EAS) is the use of a hearing aid and a cochlear implant together in the same ear. The hearing aid acoustically amplifies low frequencies, while the cochlear implant electrically stimulates the middle and high frequencies. The inner ear processes acoustic and electric stimuli simultaneously. The results of international studies have shown a highly synergistic effect between hearing aid and cochlear implant technology, particularly evident in speech understanding in noise, pitch discrimination and music appreciation. == Introduction == Electric stimulation of the auditory system via cochlear implant is a commonly used technique for individuals with a severe to profound sensorineural hearing loss, as well as for those adults and children with some residual hearing. Individuals suffering from mild to moderate hearing loss can usually benefit from hearing aids. This acoustic stimulation proves to be particularly effective in the low frequencies, though a severe hearing loss (> 70 dB HL) above 1 kHz can be beyond the range of amplification possible via acoustic stimulation. Electric stimulation (CI), on the other hand, is capable of providing high-frequency information up to 8 kHz. The concept of combining simultaneous electric-acoustic stimulation (EAS) for the purposes of better hearing was first described by C. von Ilberg and J. Kiefer, from the Universitätsklinik Frankfurt, Germany, in 1999. That same year the first EAS patient was implanted. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Electric acoustic stimulation」の詳細全文を読む スポンサード リンク
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