Creation of Dolphin-Like Spectrum Filters Through the Use of Evolutionary Programming

摘要

A type of self-optimizing computer algorithm, called evolutionary programming, was used to create a number of models of the dolphin ear. The models consisted of a series of overlapping bandpass filters that varied in sensitivity and bandpass region and were distributed across the range of dolphin hearing. The evolutionary program iteratively varied the shape, number, and distribution of filters in each model and optimized the acoustic sensitivity of the model to the hearing sensitivity of the dolphin. Final models displayed acoustic sensitivities similar to the dolphin across the range of dolphin hearing. These bandpass models are frequency domain filters usable as preprocessors to biomimetic mine countermeasure classification/detection algorithms and auditory weighting functions in environmental compliance issues related to the interaction between marine mammal populations and anthropogenic sound.