The 570C-H (CobraNet®) series digital communication stations are fully programmable touch screen user interface devices for initiating audio / visual announcements, messages, and pages with the GLOBALCOM® Series Announcement Control Systems. Each model utilizes an electret condenser cartridge that is positioned in the housing such that its frequency response is enhanced. The microphone element location provides the mechanism for good acoustical coupling to provide a full-bodied, highly intelligible voice signal.