Abstract
Basic chracteristics of hearing elicited by applying the amplitude modulated electrical stimulation to the external ear were investigated by means of psychophysical technique. The site in which sound was generated was discussed based on sound lateralization characteristics produced by applying electrical and sound stimulations to both ears.As the results, perceived sound by electrical stimulation was found to be pure tone and its threshold depended on applied voltage. The minimum auditory threshold was obtained at 800Hz signal frequency, at 100% modulation rate and at 50% duty ratio in the case of 50kHz carrier frequency. In the experiment of sound lateralization, perceived sound was proved to be caused by electrophonic effect and the site in which sound was generated was the skin surface of the external ear under the electrode.
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