Abstract
Insects can navigate and follow sound sources with precision in complex environments using efficient principles based on particular and appropriate sensory-motor processing. It is precisely these principles, little understood at this point, that we want to understand, model, and validate by rebuilding them on a micro-flying device. To achieve this goal, a new bio-mimetic acoustic sensor inspired by the cricket’s auditory system has been developed and tested in an anechoic chamber. The performance of the processing algorithm, the aperture of the auditory system, and interferences caused by the geometry of the sensor itself were first evaluated: synthetic signals were generated by a boundary element model taking into account the three-dimensional geometry of the sensor to characterize its performance in free space. A processing based on cross-correlation for localizing and tracking an acoustic source was also studied to assess whether the observed limitations were inherent to the geometry of the sensor or due to limitations of the cricket inspired processing algorithm. The sensor worked well with several synthetic chirped cricket songs. [Work supported by CNRS PIR Neuroinformatique grant SonoBot.]
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