Speech processing system and method using pseudospontaneous stimulation
A apparatus and method for inner ear implants is provided thatgenerates signal processing stochastic independence activity acrossthe excited neural population. A high rate pulse train can producerandom spike patterns in auditory nerve fibers (hereafter"pseudospontaneous activity") that are statistically similar tothose produced by spontaneous activity in the normal auditorynerve. We call this activity "pseudospontaneous". Varying rates ofpseudospontaneous activity can be created by varying the intensityof a fixed amplitude, high rate pulse train stimulus, e.g., 5000pps. The high rate pulse train can desynchronize the nerve fiberpopulation and can be combined with a data signal in an inner earimplant. The pseudospontaneous activity can enhance neuralrepresentation of temporal detail and dynamic range with an innerear implant such as a cochlear implant. The pseudospontaneousactivity can further eliminate a major difference betweenacoustic-and electrical-derived hearing percepts.
Rubinstein, J., & Wilson, B. (2005). IPC No. U.S. Speech processing system and method using pseudospontaneous stimulation. (Patent No. 6907130).