Liquid crystal displays, organic light emitting diode (OLED) displays; display modules incorporating liquid crystal display, imaging optics and housing; display modules incorporating OLED display, imaging optics and housing; integrated circuits; head-mounted display devices, namely, head mounted video displays for providing audio and visual information to the wearer; smart headsets for displaying visual information to the wearer and/or taking audio input from the wearer and providing audio signal to the wearer; smart eyewear for displaying visual information to the wearer and/or taking audio input from the wearer and providing audio signal to the wearer; noise canceling headsets for taking audio input from the wearer and providing audio signal to the wearer; computer software used in electronics devices and headsets featuring algorithm to extract voice signal in acoustic environment containing noise