An exemplary speech processor configured to be used in a cochlear implant system includes signal processing circuitry that 1) separates an incoming audio signal into a plurality of channels, wherein each channel included in the plurality of channels includes a channel signal included in a plurality of channel signals and representing a portion of the audio signal, 2) selects one or more channel signals from the plurality of channel signals that have a spectral power that exceeds a predetermined threshold value, the selected one or more channel signals corresponding to one or more channels included in the plurality of channels, and 3) designates only the one or more channels that correspond to the selected one or more channel signals to be used for stimulation representative of the incoming audio signal.
