Here the interpreter conveys, as quickly as possible, what the source language speaker is saying. This form of interpreting is used in situations where time is of the essence, and the speaker cannot/does not want to wait for the interpreter to communicate what has been said. What is important is that the thoughts and messages are relayed accurately to the listening audience, so that they can follow in the same way as native speakers can.
It is also possible to interpret in several languages at the same time, when several simultaneous interpreters (two per language) work synchronously.
Simultaneous interpreters work in a sound-proof booth and speak into a microphone, while the audience can follow what is being said through headphones.
If the interpreting is into several languages, listeners can choose their language by pressing a button. As simultaneous interpreting requires extreme concentration, two simultaneous interpreters work into one language in a single booth, switching every 20 minutes on average.