| Subject: | Modifying the sample rate attribute in the file header from 96 kHz to 5.5 kHz, which stretches the time scale by a factor of 17.45 = 96 kHz / 5.5 kHz. As a result, the ultrasonic bat calls move down into our hearing range. |
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| Previous by Date: | High-pass filtering at a cut-off frequency of about 1 kHz in order to remove low-frequency noise., Unknown |
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