From a soundproof booth interpreters transmit the speaker's words into the other language at the same time he or she is speaking.

Due to the high level of concentration required for this task, the simultaneous interpreters alternate every 20 to 30 minutes.

This is why simultaneous interpreters usually work in teams of two per target language.

Best employed at: Multi-lingual conferences and events with a greater number of participants such as seminars, project presentations, European Works Councils, or shareholders' meetings.