This artifact would necessarily delete C sharp from every octave in a piece of music. The solution would be to use two microphones of different sizes and combine their output. The solution in the present case was to use a two pulse procedure where the two pulses were of different durations. What the first pulse could not detect the second pulse filled in. The view was that larger or broader samples would diminish random error.
Several tasks remain.
An example of the practical and paradigmatic fecundity of the analysis is providing the tools to solve inverse questions. To the degree that linear analysis can provide a general framework for these questions, it will contribute to a systematic account for them. A closed form analytical solution to the inverse problem is not yet available. A curve was fit to the increasing and decreasing series for each bird. Birds will be exposed to these procedures to determine the degree to which linear analysis can productively predict rates in highly constrained situations.