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

摘要

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.