Similarly to opening a selection with Praat you can also carve out a selection and save it as a separate wave file. Make a selection (see Section 5.8) and right-click in the waveform viewer. Choose Clip Selection With Praat. The selected part will now be stored in the same folder as the original *.wav file, with a suffix like _23718_25110.wav, the numbers represent the begin and end, expressed in milliseconds. The selection will also be opened in a new Praat screen.