Half-cardioid condenser boundary microphone are highly-shielded from RFI/GSM thanks to EV’s exclusive RF shield technology. It is a full-range condenser microphone designed to be used for surface mounted applications such as distance learning centers, video conferencing systems, teleconferencing systems and sound reinforcements. The polar pattern is half-cardioid (half-space cardioid) to promote good gain-before-feedback and suppress ambient noise. All boundary type microphones operated on a flat surface are subject to an increase in sensitivity of the microphone with increasing frequency, this is called the baffle effect. To counteract this effect, it has been designed with internal equalization to give flat sensitivity response.