Hall MEMS Technology MicrophoneHall MEMS Technology Microphone The Hall MEMS Technology Microphone is engineered as a powerful add on for the Mercury Video Bar, designed to dramatically extend pickup distance and deliver crystal clear audio in open plan huddle spaces and small to medium meeting rooms. Built with four MEMS omnidirectional microphone arrays, this compact enhancement captures voices from across the room with consistency, while keeping background noise to a minimum.