Design of a dynamic sonar emitter inspired by hipposiderid bats.

摘要: The ultrasonic emission of the biosonar systems bats, such as Old World leaf-nosed bats (family Hipposideridae) and related horseshoe Rhinolophidae), is characterized by a unique dynamics where baffle shapes ('noseleaves') deform while diffracting outgoing wave packets. As now, nothing comparable to this has been used in any engineering application (e.g. sonar or radar). Prior work with simple concave demonstrated impact on characteristics, but it remained unclear whether was simply due change aperture size also influenced geometrical shape detail. Hence, would be possible further enhance time-variant effects reported so far through different static dynamic geometries. To address issue, we have created biomimetic detail modeled after Pratt's roundleaf (Hipposideros pratti). deformation characteristics evaluated virtue gradient magnitude entropy orientation. results shown that much larger gradients signal representation, which jointly over direction time.