Patent ID: 7542806

Claim:
An Implantable Cochlear Stimulation (ICS) system including envelope based amplitude mapping, comprising: an implantable part including a cochlear electrode array; and a speech processor including a microphone and a signal processor, wherein the microphone converts acoustic energy into an electrical signal provided to the signal processor, and wherein the signal processor includes a bandpass filter for filtering the electrical signal to generate at least one filtered signal; an envelope detector for computing at least one envelope signal from the at least one filtered signal; a decimator for computing at least one decimated signal from the at least one signal envelope, a log mapper for computing at least one mapped signal from the at least one decimated signal; and a multiplier for computing at least one output signal from the at least one mapped signal and the at least one filtered signal; wherein the multiplier multiplies the at least one mapped signal and the electrical signal to produce an output signal for the cochlear electrode array.