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dc.contributor.authorMing, Chenen
dc.contributor.authorZhu, Hongxiaoen
dc.contributor.authorMüller, Rolfen
dc.description.abstractFoliage echoes could play an important role in the sensory ecology of echolocating bats, but many aspects of their sensory information content remain to be explored. A realistic numerical model for these echoes could support the development of hypotheses for the relationship between foliage properties and echo parameters. In prior work by the authors, a simple foliage model based on circular disks distributed uniformly in space has been developed. In the current work, three key simplifications used in this model have been examined: (i) representing leaves as circular disks, (ii) neglecting shading effects between leaves, and (iii) the uniform spatial distribution of the leaves. The target strengths of individual leaves and shading between them have been examined in physical experiments, whereas the impact of the spatial leaf distribution has been studied by modifying the numerical model to include leaf distributions according to a biomimetic model for natural branching patterns (L-systems). Leaf samples from a single species (leatherleaf arrowwood) were found to match the relationship between size and target strength of the disk model fairly well, albeit with a large variability part of which could be due to unaccounted geometrical features of the leaves. Shading between leaf-sized disks did occur for distances below 50 cm and could hence impact the echoes. Echoes generated with L-system models in two distinct tree species (ginkgo and pine) showed consistently more temporal inhomogeneity in the envelope amplitudes than a reference with uniform distribution. However, these differences were small compared to effects found in response to changes in the relative orientation of simulated sonar beam and foliage. These findings support the utility of the uniform leaf distribution model and suggest that bats could use temporal inhomogeneities in the echoes to make inferences regarding the relative positioning of their sonar and a foliage.en
dc.description.sponsorshipVirginia Tech Biobuild Programen
dc.description.sponsorshipNational Science Foundationen
dc.description.sponsorshipNSF: 1053130en
dc.description.sponsorshipNSF: 1611901en
dc.description.sponsorshipNaval Engineering Education Center, National Natural Science Foundation of Chinaen
dc.description.sponsorshipNEEC: 11374192en
dc.description.sponsorshipNEEC: 11074149en
dc.description.sponsorshipNEEC: 11574183en
dc.description.sponsorshipVirginia Tech Institute for Critical Technology and Applied Scienceen
dc.description.sponsorshipICTAS-JFC 175139en
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.titleA simplified model of biosonar echoes from foliage and the properties of natural foliagesen
dc.typeArticle - Refereeden
dc.contributor.departmentMechanical Engineeringen
dc.title.serialPLOS ONEen

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Creative Commons Attribution 4.0 International
License: Creative Commons Attribution 4.0 International