Extratympanic electrode support via vented earmold.

An adaptation of the Stypulkowski extratympanic electrode design is described. The electrode is supported by a stock earmold which has been vented with a large enough bore to just accommodate the tubing used in this electrode design. The electrode tubing and wire assembly is merely advanced through the vent and released upon contact with the tympanic membrane; further manipulation is not required to maintain contact. The earmold also serves to couple the second transducer to the ear canal. This approach offers ease of electrode placement and consistency of positioning and, thereby, simplifies the extratympanic method of (noninvasive) electrocochleography.