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

'adjust':17 'and/or':34 'apparatus':7 'audienc':42 'audio/video':20,23 'balanc':15 'cabl':55 'chairman':35 'choic':40 'communic':3 'compris':5 'confer':2 'congress':32 'control':6,12 'deleg':33 'electron':1 'headphon':46 'interpret':27 'loudspeak':47 'microphon':45 'modem':53 'multipl':39 'name':8,31 'on/off':9 'parliamentari':38 'plug':50 'power':48 'receiv':21 'respons':43 'signal':24 'simultan':26 'socket':52 'suppli':49 'switch':10 'system':4 'therewith':57 'transmitt':28 'treble/bass':19 'unit':30,36 'use':56 'volum':14 'vote':29,44

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