Interface Headset

File:Interface Headset Example.jpg

An Interface Headset Example.

An Interface Headset is a small device worn on an Evangelion pilot's head, which is the primary means by which a pilot controls an Eva Unit. It does this by linking with the cranial nerves of the pilot, thus allowing the pilot to "synchronize" with the Eva and control its movements. Of these nerves, the most important is this "A¹⁰ nerve", which is associated with higher order brain functions such as memory, cognizance and the execution of movement, and with emotions such as anxiety, fear, happiness and pleasure. In addition, it is also said to play an important role in affection between parent and child, and between lovers.

Interface Headsets are usually worn in conjunction with a Plug suit, however Plug suits do not appear to be absolutely required to pilot an Eva, as there are a few occasions when there was no time and the pilot just hurried into the Eva without one, but an Interface Headset has always been worn each and every time someone has piloted an Eva (the sole exception being Shinji Ikari in Episode 26') and it would seem to be an absolutely required part of synchronizing with the Eva.

Interface Headsets give the appearance of being two small plastic devices placed on top of the head, one on either side. The interface headset is actually one object: a thin wire "tiara" links the two larger pieces atop the head. The wire section is nestled beneath the pilot's hair and thus always obscured from view, making it appear as if the headset is comprised of two separate devices placed on top of the head.

Asuka Langley Soryu near-constantly wears her Interface Headset, at home and while at school. This is a way of putting her status as Eva pilot, within which she takes great pride, on exhibition.

In Volume 1 of the manga adaptation of the series by Yoshiyuki Sadamoto, Sadamoto introduces the bonus materials section at the end of the volume by offering the explanation that:

"On the floor of the midbrain is the ventral tegmental system, that neurobiologists call region A¹⁰. Cells soaked in dopamine, certain emotions are processed here: such as the thoughts of two lovers - or a parent and a child. And it is the synchronization of the threads and bundles of A¹⁰ that splice pilot and Eva together; to become one entity, to fight. In other words, the power of love drives this weapon of mass destruction."

Notes

• Exactly what Interface Headsets are and how they function is never explicitly elaborated upon on-screen, but is from Gainax-released background material, such as the Red Cross Book.
• Eva pilots are never seen putting on or taking off Interface Headsets during the entire series. The wire tiara which actually connects the two larger pieces and supports them in place on top of the head is also never seen on-screen as a result (it is hidden under their hair when worn), but only in behind-the-scenes production sketches. This has resulted in many fans assuming that the two plastic pieces clearly visible atop the head are somehow just "stuck" on the head, either with adhesive, by being attached like a hairclip, etc. when actually the entire thing is a single headset. As these objects were never formally named on-screen, fans frequently refer to them as "A10 nerve clips", because the description of them in the Red Cross Book says that they interact with the A10 nerve. However, script production notes (released with the Renewal of Evangelion DVDs) clearly and repeatedly refer to the object as an "Interface Headset".