def undeaf
      response = Network.post(['Conferences', self.conference_sid, 'Participant', self.call_sid], { :Deaf => false })
      Participant.new(response)
    end
def undeaf
      response = Network.post(['Conferences', self.conference_sid, 'Participant', self.call_sid], { :Deaf => false })
      Participant.new(response)
    end
Undeaf a participant of a conference call, returning a Telapi::Participant object
 See http://www.telapi.com/docs/api/rest/conferences/deaf-or-mute/