CONCENTUS

Electronic conference communication systems comprising control apparatus, namely, on/off switches, and controls for volume, balance, and adjustment for treble/bass; audio/video receiver and audio/video signal and simultaneous interpretation transmitters; voting units, namely congress delegate and/or chairman unit for parliamentary, multiple choice or audience response voting; microphones, headphones, loudspeakers, power supplies, plugs and sockets, modems and cables used therewith