In this file we construct a uniform filterbank using a the impulse response of a 4th order gammatone for each channel. The center frequencies are equidistantly spaced on an ERB-scale, and the width of the filters are chosen to match the auditory filter bandwidth as determined by Moore.
Each channel is subsampled by a factor of 8 (a=8), and to generate a nice plot, 4 channels per Erb have been used.
The filterbank covers only the positive frequencies, so we must use filterbankrealdual and filterbankrealbounds.
B. R. Glasberg and B. Moore. Derivation of auditory filter shapes from notched-noise data. Hearing Research, 47(1-2):103, 1990.