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Fig. 6 | BMC Zoology

Fig. 6

From: Ontogeny of audible squeaks in yellow steppe lemming Eolagurus luteus: trend towards shorter and low-frequency calls is reminiscent of those in ultrasonic vocalization

Fig. 6

Five contour shapes occurring in sharp squeaks of pup and adult yellow steppe lemmings: flat from 14-day old pup; chevron from 5-day old pup; chevron from 29-day old pup; upward from 37-day old pup; downward from 8-day old pup; complex from 2-day old pup; complex from 28-day old pup. The Audio file is available at Audio S2. Spectrogram was created using sampling frequency 48 kHz, a Hamming window, FFT 1024 points, frame 50% and overlap 93.75%

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