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The goal of this study was to evaluate the effects of ovarian hormones on female rat ultrasonic vocalizations (USVs). Twenty (10 control and 10 ovariectomized) 3-month-old female rats were recorded in 3 recording conditions (elicitation, dyad, and isolation) over a full estrous cycle or time-matched duration. There were differences in USV acoustics (frequency and complexity parameters) across recording conditions but no differences in USV acoustics between control and ovariectomized groups. USVs produced in isolation had lower frequency and complexity parameters than elicited USVs for both control and ovariectomized rats. Additionally, for control rats, USV parameters of frequency, complexity, duration, and intensity changed depending on the estrous state. Therefore, although fluctuating hormone levels may influence USV acoustics, this variation can be controlled for by ovariectomizing female rats.
Pubmed ID: 33217390
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A multi-channel triggering hard-disk recording system designed specifically for bio-acoustics, although it can be used for other audio signals. This software uses real-time spectrographic and spectrum display and posesses a customizable metadata input tool for embedding user-defined data directly into the resulting .wav files. The maximum sampling rate for real-time display and streaming to disk depends on the type of acquisition board and computer performance. These embedded records can later be accessed from SASLab Pro and integrated into another metadata base.
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