... 10 R model predicts at longer distances and more at shorter distances as a consequence of the significant influence of absorption at longer ranges. Using a microphone array and an acoustic recording tag, we show that the output adjustments of two Hipposideros pratti and one Hipposideros armiger do...

...Jens C. Koblitz; Peter Stilz; Hans-Ulrich Schnitzler SUMMARY Recordings of the echolocation signals of landing big brown bats with a two-dimensional 16-microphone array revealed that the source level reduction of 7 dB per halving of distance is superimposed by a variation of up to 12 dB within...

... of future investigations, our study has uncovered unexpected vocal and morphological complexity in an otherwise well-known species. Moreover, our findings highlight the usefulness of microphone arrays, and suggest that future studies employing multi-channel recording techniques may uncover additional...