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This paper provides new insights into the problem of selecting filter centerfrequencies for the auditory filterbanks. We propose to use a constantfrequency distance and a consistent frequency coverage as the two metrics thatmotivate the logarithmic frequency scaling and a regularized selection ofcenter frequencies. The frequency scaling and the consistent frequency coveragehave been derived based on a common harmonic speaker signal model. Furthermore,we have found that the existing linear equivalent rectangular bandwidth (ERB)function as well as any possible linear ERB approximation can also lead to aconsistent frequency coverage. The results are verified and demonstrated usingthe gammatone filterbank.

Logarithmic Frequency Scaling and Consistent Frequency Coverage for the Selection of Auditory Filterbank Center Frequencies