[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 34.237.138.69. Please contact the publisher to request reinstatement.
[Skip to Content Landing]
Article
March 1971

Electrical Stimulation of the Human Cochlea: A Preliminary Report

Author Affiliations

San Francisco
From the Department of Otolaryngology, University of California, San Francisco.

Arch Otolaryngol. 1971;93(3):317-323. doi:10.1001/archotol.1971.00770060455016
Abstract

The results of previous animal research indicated that the mammalian ear is able to hear pitch and amplitude with great accuracy when a uniform audioelectrical field is applied to the basal membrane. Four patients were tested with electrodes placed temporarily in the lower scala. Two heard only noise when stimulated with sine waves and were eliminated from any further procedures. The other two exhibited a remarkable ability to discriminate pitch and amplitude. Later, they had a permanent internal system implanted. Pitch and amplitude discrimination was almost normal. Dynamic range was stable at 30 dB. Bekesey audiometry was repeatedly and consistently performed without difficulty. Speech recognition was immediate, but information was low. Nevertheless, both patients were able to perform certain speech recognition tasks with results above the chance level.

×