2. The headset display system computer of claim 1 , the speech recognition engine, upon recognizing the substitute speech command, causes a first action to be performed, wherein the first action corresponds to the preset speech command.
2. The headset display system computer of claim 1 , the speech recognition engine, upon recognizing the substitute speech command, causes a first action to be performed, wherein the first action corresponds to the preset speech command. 3. The headset display system computer of claim 2 , wherein the first action is performed only when the speech recognition engine recognizes the substitute speech command.