1. An information recognition device that recognizes content of an utterance of a speaker using a myo-electrical signal of a muscle of the speaker when the speaker is speaking, comprising: a myo-electrical signal acquisition unit configured to acquire said myo-electrical signal; an activity amount information extraction unit configured to extract information of an activity amount of said muscle from said myo-electrical signal; an information recognition unit configured to recognize the content of said utterance using said information of the activity amount of said muscle; an audio information acquisition unit configured to acquire audio information of sound generated on said utterance, said audio information being different from said information of an activity amount of said muscle; an audio information recognition unit configured to recognize the content of said utterance using said audio information; and a learning unit configured to perform learning of recognizing the content of said utterance using said information of the activity amount of said muscle and produce recognition parameters, by using said information of the activity amount of said muscle extracted by said activity amount information extraction unit and the content of the utterance recognized by said audio information recognition unit as teaching data, wherein said information recognition unit is configured to recognize content of a respective utterance of the speaker by referring to the result of the learning unit, using a neural network that receives respective information of an activity amount of said muscle extracted by said activity amount information extraction unit as an input and provides the input to an output layer that recognizes contents of the respective utterance using the recognition parameters produced by the learning unit.