Spectrogram illustrating the acoustic similarity between the high-frequency squeaks of a dhole (A) and the whistles of a human (B).


<p>(A) A natural series of a captive male dhole. (B) A natural series of an adult male zoo visitor, imitating the dhole calls (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0146330#pone.0146330.s004" target="_blank">S4 Audio</a>). A 5 kHz high-pass filter was applied to remove background noise. Spectrogram settings as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0146330#pone.0146330.g001" target="_blank">Fig 1</a>.</p

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