Simultaneous interpretation (SI) is a mode of interpreting in which the interpreter translates the speaker’s message in real-time while the speaker is still speaking.

In simultaneous interpretation, the interpreter typically listens to the speaker through headphones and simultaneously interprets the message into the target language through a microphone, which is then transmitted to the listeners through headphones. Simultaneous interpretation is often used in larger settings such as conferences, conventions, or international summits.

The advantage of simultaneous interpretation is that it allows for faster communication and can save time as the interpreter does not have to wait for the speaker to finish before conveying the message in the target language. This mode of interpreting also allows for more natural and fluid communication between the parties involved as there is no need for interruptions or pauses.