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Fig. 7 | BMC Zoology

Fig. 7

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. 7

Nonlinear phenomena occurring in the sharp squeaks of pup and adult yellow steppe lemmings: deterministic chaos from a 5-day old pup; chaos from a 15-day old pup; chaos from a 35-day old pup; subharmonics from a 28-day old pup; subharmonics from a 25-day old pup; subharmonics and chaos from an adult male; frequency jump and chaos from a 6-day old pup; frequency jump from a 15-day old pup; subharmonics, frequency jump and chaos from a 6-day old pup. The Audio file is available at Audio S3. Spectrogram was created using sampling frequency 48 kHz, a Hamming window, FFT 1024 points, frame 50% and overlap 93.75%

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