Carrier and Envelope Triggered Cochlear Stimulation

A computer program product implemented in a computer readable storage medium for generating electrode stimulation signals for an implanted electrode array, the product comprising:

• program code for processing an acoustic audio signal to generate a plurality of band pass signals, wherein each band pass signal includes a fine structure carrier signal and a modulator envelope signal;
• program code for each band pass signal for:
• i. extracting fine time structure information from the carrier signal to determine a sequence of stimulation event signals,
• ii. for one or more low frequency band pass signals, sampling the modulator envelope signal synchronously with the carrier signal to create envelope weighted stimulation event signals,
• iii. for one or more higher frequency band pass signals,
• (1) if and only if the modulator envelope signal exceeds a sampling threshold value, then
• (2) sampling the modulator envelope signal synchronously with the carrier signal to create envelope weighted stimulation event signals,
• program code for processing the envelope weighted stimulation event signals to produce electrode stimulation signals for the implanted electrode array.