Global ETD Search
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Showing 1 to 7 of 7 for “"Beampatterns"”.
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Analysis of Bat Biosonar Beampatterns: Biodiversity and Dynamics
… interface between the bat and its environment. Beampatterns describe this interface as joint time-frequency transfer functions which vary across spatial direction. This dissertation considers bat biosonar shape diversity and shape dynamics manifest as beampatterns. In the first part, the …
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Biodiversity and dynamics of direction finding accuracy in bat biosonar
… part has investigated how well bat biosonar beampatterns are suited for direction finding using a measure of the smallest estimator variance that is possible for a given direction (Cram{'e}r-Rao lower bound, CRLB). CRLB values were estimated for numerical beampattern estimates derived from …
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Numerical analysis of bat noseleaf dynamics and its impact on the encoding of sensory information
… bats. The shapes are acoustically characterized (beampatterns) numerically using a finite element implementation. These beampatterns are then analyzed using an information-theoretic approach. The followings findings were obtained: i) noseleaf dynamics altered the spatial distribution of energy, …
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A Numerical Elastic Model for Deforming Bat Pinnae
… are capable of large ear deformations, these beampatterns can be time-variant. To investigate this time-variance using numerical methods, a digital model that is capable of representing the pinna geometry during the entire deformation cycle has been developed. Due to large deformations and …
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Comparison of the Role of Beamwidth in Biological and Engineered Sonar
… the evolutionary optimization of bat biosonar beampatterns has been directed at other factors that have left beamwidth as a byproduct. Alternatively, the biosonar systems may require beamwidth values that are larger than the physical limit and differ between species and their sensory ecological …
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Deep Learning-Driven Modeling of Dynamic Acoustic Sensing in Biommetic Soft Robotic Pinnae
… network models in inferring biomimetic pinna beampatterns from actuator states enables an extensive exploration of the vast actuation pattern space to identify pinna actuation patterns optimally suited for specific biosonar sensing tasks. This simulation-based approach provides a powerful …
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Interference Mitigation by Reconfigurable Adaptive Antenna Array
… error between the synthesized and desired beampatterns, minimum estimation variance or high resolution capability depending on different selection metrics.