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. 2022 Jan 14;15:812142. doi: 10.3389/fnbeh.2021.812142

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Copyright © 2022 Berz, Wöhr and Schwarting.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Exemplary response calls during 50-kHz USV playback. The first picture is always the 50-kHz USV playback sequence and the following pictures show response calls in addition to the 50-kHz USV playback sequence (red arrows) < 32 kHz (A) or > 32 kHz (B) of WI and SD rats. Exemplary high-resolution spectrograms (frequency resolution 488 Hz; time resolution 0.512 ms) were generated with SASLab Pro software 5.2.09 (Avisoft Bioacoustics) via fast Fourier transformation (512 FFT length, 100% frame, Hamming window, and 75% time-window overlap).