In simultaneous interpretation (SI) teams of two interpreters per language work from soundproof booths, rendering a speaker’s message in the target language almost simultaneously. You always need two interpreters per language and booth.

Technical interpretating equipment, such as interpreters' booths, microphones, headphones, transmitters, consoles and all related sound and audio components, is also required. Conference interpreters are employed at international conferences, congresses, symposia, workshops, meetings, negotiations and occasionally at legal proceedings.