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Top: A 9-second long excerpt of natural, conversational speech, with its broad-band temporal envelope overlaid in red. The temporal envelope was extracted by calculating the RMS power of the broad-band sound wave, following the procedure described by (Lalor & Foxe, 2010). Bottom: A typical spectrum of the temporal envelope of speech, averaged over 8 token of natural conversational speech, each one ~10 seconds long.
