Accession Number:

ADA383542

Title:

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

Descriptive Note:

Final rept.

Corporate Author:

SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA

Report Date:

2000-09-01

Pagination or Media Count:

31.0

Abstract:

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 classificationdetection algorithms and auditory weighting functions in environmental compliance issues related to the interaction between marine mammal populations and anthropogenic sound.

Subject Categories:

  • Biological Oceanography
  • Computer Programming and Software
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE