the use of detected non - verbal communications cues , and summaries thereof , are used to provide audible , textual and / or graphical input to listeners who for any reason do not have the benefit of being able to see the non - verbal communications cues , or speakers about mannerisms or other non - verbal signals they are sending to other parties . this includes cues that are given while speaking or listening . the detection of one or more of an emotion and gesture could also trigger a dynamic behavior . for example , certain emotions and gestures could be characterized as “ key emotions ” or “ key gestures ” and a particular action associated with the detection of one of these “ key emotions ” or “ key gestures .”