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Pratts roundleaf bat(Hipposideros Pratti)is a typical type of constant frequency-frequency modulation(CF-FM)bats.As motion relative to target in flying causes frequency difference between the echo and the emitted pulse,this kind of bat adjusts the frequency of emitted pulse by Doppler-shift compensation(DSC),thus maintaining the echo frequency within the narrow frequency range that the bats can hear best(Mantani et al.2012; Smotherman 2008; Schuller and Pollak 1979; Hiryu et al.2005).