1 The Maersk Mc-Kinney Moller Institute, Faculty of Engineering, SDU2 Faculty of Engineering, SDU3 The Maersk Mc-Kinney Moller Institute, Faculty of Engineering, SDU
Understanding and modeling bat biosonar behavior should take into account what the bat actually emitted while exploring the surrounding environment. Recording of the bat calls could be performed by means of a telemetry system small enough to sit on the bat head, though filtering due to bat directivity affects recordings and not all bat species are able to carry such a device. Instead, remote microphone recordings of the bat calls could be processed by means of a mathematical method that estimates bat head orientation as a first step before calculating the amplitudes of each call for each frequency. This approach considers bat position with respect to each microphone, directivity, and head orientation for compensating microphone recordings of bat calls. The method has been tested in a laboratory environment using data from a Polaroid transducer as sound source: results are presented and discussed. A further improvement of the method is necessary as its performance for call reconstruction strongly depends on correct choice of the sample at which the recorded call is thought to start in each microphone data set.