The [Meeting Central] Facilitator can be used along with … who is present … who is speaking … [who wants to speak]. Simple expression buttons (huh? and yea!) provide … In addition … [a] simple voting mechanism using up and down … [p. 424] users can visually let people know if … or too soft … , if there is too much background noise … A mute button … provides every user with the ability to mute … [Also] a "Push to whisper" button.
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