what is ifb in broadcasting
The IFB is a special intercom circuit that consists of a mix-minus program feed sent to an earpiece worn by talent via a wire, telephone, or radio receiver (audio that is being fed back to talent) that can be interrupted and replaced by a television producer 's or director's intercom microphone.
Lectrosonics IFB T4-19IFB Transmitter, Base Station Type, Block 19 (486.400 - 511.900 MHz). This frequency agile IFB transmitter is designed for use in broadcast, motion picture, theater, and stage applications where extended operating range and high quality audio are essential.