Electric acoustic stimulation system
Combined electric acoustic stimulation – EAS™
MED-EL is the pioneer of combined Electric Acoustic Stimulation. EAS is a potential solution for partial deafness, known also as high frequency hearing loss. High frequency hearing loss is a type of sensorineural hearing loss, which occurs when the hair cells in the cochlea are missing or damaged. It is different from normal sensorineural hearing loss because the extent of hearing loss varies depending on the sound frequency.
EAS provides both electric stimulation through the cochlear implant and acoustic amplification similar to a hearing aid so that users can hear all frequencies. The audio processor recognizes sounds, converts high frequencies into electrical impulses and acoustically amplifies low frequencies. The electrical impulses are sent directly to the cochlear through an electrode, while the acoustically amplified sounds follow the natural hearing path.
SONNET EAS Audio Processor
The SYNCHRONY EAS system with SONNET EAS audio processor is a 3rd generation Electric Acoustic Stimulation (EAS) system developed by MED-EL. SONNET EAS combines the SONNET audio processor with an acoustic unit and customised ear mould to provide the necessary acoustic stimulation across the low frequencies and electric stimulation in the high frequencies. With 6-channel 48 dB acoustic amplification across the low frequencies, SONNET EAS is the ideal solution for candidates with partial deafness.
FLEX24 and FLEX20 electrodes
The FLEX24 and FLEX20 electrodes have been developed specifically for people with partial deafness, as they only cover the basal end of the cochlea which responds to high frequency sounds. The unique electrodes with wave-shaped wires and FLEX-Tip significantly reduce insertion force and are gentler on the delicate structures of the middle ear.
MED-EL offers the most extensive portfolio of electrodes in the world, providing each candidate with the opportunity to select the ideal electrode for them. Specially designed to preserve the integrity of the inner ear's most delicate structures, MED-EL's electrodes are the most atraumatic electrodes ever produced. Only MED-EL's long, flexible electrodes, which facilitate structure preservation, can be fully inserted into the cochlea, achieving complete cochlear coverage for optimal hearing outcomes.