Ear Canal Electrode Plug and CM Recording

An ear canal electrocochleographic electrode was newly designed and CM were recorded from the children of 5 years old.The electrode was mounted in a cuff which was attached at the tip of a silicon tube. The silicon tube was inserted easily and without pain into the bony part of the outer ear canal, and the cuff was inflated by pinch pump and fixed to the canal wall. The tone stimuli were delivered from a earphone in a metal box and conducted by a metal tube to the silicon tube in the canal. AP and CM were recorded by tone stimulus of 80dB. Electric and mechanic artifacts of tone stimuli were examined and excluded.