Time-Frequency Computational Model for Echo-Delay Resolution in Sonar Images of the Big Brown Bat, Eptesicus Fuscus

Abstract

Biosonar animals have a remarkably accurate and noise tolerant sonar. Some bats use their auditory system to achieve full 3D navigation capabilities and prey discrimination. They reach a resolution in the sub-millimeter range. Likewise, some dolphins utilize their auditory system to achieve a combination of 3D navigation and internal object examination that far exceeds the abilities of our current ultrasound and underwater sonar technology. We have devoted our research efforts during the last year of the project into utilizing the knowledge about biosonar that we have gained in previous years to developing practical sonar techniques for the benefit of homeland security tasks as well as medical applications. Specifically, we demonstrate improved underwater sonar resolution and ultrasound imagery.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 31, 2005
Accession Number
ADA441559

Entities

People

  • Leon Cooper
  • Nathan Intrator

Organizations

  • Brown University

Tags

Communities of Interest

  • Biomedical
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Background Noise
  • Frequency
  • High Resolution
  • Homeland Security
  • Image Registration
  • Navigation
  • Noise
  • Noise Reduction
  • Signal Processing
  • Simulations
  • Simulators
  • Sonar Images
  • Sonar Ranging
  • Sonar Signals
  • Students

Readers

  • Aerospace Engineering
  • Marine Mammal Biology
  • Systems Analysis and Design