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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2017 Jan 18;64(11):2639–2649. doi: 10.1109/TBME.2017.2654361

Fig. 15.

Fig. 15

(a) Audio waveform of “Hello World” with speech detection to indicate the beginning (green flag) and end (red flag) of the utterance. (b) Synchronous spectrogram of the “Hello World” audio signal.