Skip to main content
. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2014 Apr;61(4):1241–1250. doi: 10.1109/TBME.2014.2298897

Fig. 1.

Fig. 1

Raw data and spectrograms of the experimental procedure. (a) Audio waveform of the speech response while the subject articulated several syllables (e.g., ‘bah’, ‘gah’, ‘dah’, ‘pah’, and ‘tah’). (b) Normalized spectrogram of the speech response during the same time period as shown in (a). (c) and (d) Normalized spectrograms of neural data as recorded from the most and least discriminative electrodes 24 and 16, respectively. The electrode 24 was located over posterior superior temporal gyrus and the electrode 16 was located over parietal operculum (see Fig 3).