Complex sentence: The Voice Recognition Unit packaged with the game has also been criticized, because it appears to be calibrated to accept higher pitched voices, like that of a child, and usually does not detect the input of a deep child or adult voice.
Split into simpler sentences: The Voice Recognition Unit packaged with the game has also been criticized; it was calibrated to accept higher pitched voices, like that of a child. The Unit usually does not detect the input of a deep child or adult voice.