Abstract: Apparatus for electric stimulation and diagnostics of auditory nerves of a human being, e.g. for determination of sensation level (SL), most conformable level (MCL) and uncomfortable level (UCL) audibility curves, includes a stimulator detachably secured to a human being for sending a signal into a human ear, and an electrode placed within the human ear and electrically connected to the stimulator by an electric conductor for conducting the signals from the stimulator into the ear. A control unit is operatively connected to the stimulator for instructing the stimulator as to characteristics of the generated signals being transmitted to the ear.

Abstract: A process and device for electrical stimulation of the auditory nerve by a combined pulse and speech resembling analog signal both of which are processed from audio input signals, transmitted to the electrodes in place with the positive amplitude of the dominate portion, i.e., the fundamental frequency of the analog signal.