Introduction -- Basic research -- Studies in cats -- Studies in guinea pigs -- Drug delivery studies -- Preservation of RLFH -- Insertion depth -- Histological evaluation -- Surgical techniques -- Electrode design -- Imaging techniques for assessing insertion depth -- Intracochlear pharmacological treatment -- Development of a combined EAS device -- Indication guidelines for EAS -- Fitting and rehabilitation -- Fitting -- Rehabilitation -- Clinical results -- How much of RLFH can be preserved after EAS surgery? -- What happens if RLFH cannot be preserved? -- Hearing and speech perception with EAS -- EAS and music perception -- Impact of insertion depth on quality of hearing -- EAS versus bimodal, EAS plus contralateral HA and bilateral EAS -- EAS and progressive hearing loss -- EAS versus digital Frequency lowering -- EAS in children -- Discussion -- Conclusion -- Disclosure statement -- References

1. Hearing
2. Acoustics