A method for determining the level of stimulation signals generated by an auditory prosthesis as a result of processing an electrical audio signal representative of sound is disclosed, the method comprising: converting the audio signal into a plurality of frequency-based signal components; analyzing one or more of the signal components to determine a quantity associated with the presence of a target signal in the analyzed signal component; and calculating the signal level based on the determined quantity when the determined quantity indicates a target signal is sufficiently present in the audio signal.