EAS is a hearing implant solution designed for people with partial deafness. These individuals have residual hearing in the low frequencies but have a profound hearing loss in the high frequencies. For people with partial deafnesss, hearing aids often provide unsatisfactory results in understanding speech or listening to complex sounds such as music. Traditional cochlear implant systems are also not ideal because they do not allow users to benefit from their natural low frequency hearing abilities.

Combined Electric Acoustic Stimulation, or EAS, is the concept of using acoustic amplification and cochlear implant technology together in the same ear. With EAS, the inner ear is provided with acoustic and electric stimuli and is able to process both high and low frequency information simultaneously.

EAS consists of two parts, an external and an internal component.

Internal

• Implant
  The implant consists of a housing, which contains the electronics, and the electrode array as well as the receiving antenna and a magnet that holds the coil in place behind the ear.

External

• Audio processor
  The Audio processors features a digital acoustic unit for amplification that enhances a person's natural low-frequency hearing and is worn behind the ear. For higher frequency sounds, the cochlear implant function automatically takes over. The intelligent integration of both modalities results in a synergistic effect for speech and sound perception offering an optimal solution for individuals with partial deafness.