Simultaneous Interpretation
Real-time interpretation with less than 3-second delay. The interpreter works from a soundproof booth, rendering the speaker's words into the target language as they speak.
What Is Simultaneous Interpretation?
Simultaneous interpretation is the real-time rendering of speech from one language to another, with a delay of less than 3 seconds. The interpreter sits in a soundproof booth, listens through headphones, and speaks into a microphone. Audience members receive the interpretation through wireless receivers.
This is the mode you see at the United Nations, international summits, and large conferences. It allows proceedings to continue at normal speed with no pauses for translation.
The cognitive load is extraordinary. Unlike consecutive interpretation where the speaker pauses, simultaneous interpreters must listen, process, and speak at the same time — a feat that requires years of training and practice.
When to Use Simultaneous
International Conferences
Multi-language events where speed is essential and speakers cannot pause after every sentence.
Diplomatic Summits
Government and inter-governmental meetings where protocol demands uninterrupted proceedings.
Large Assemblies
Shareholder AGMs, industry summits, and events with 50+ attendees needing interpretation.
Live Broadcasts
Television, live streaming, and media events requiring real-time multi-language output.
Trade Shows
Exhibition keynotes, panel discussions, and product launches with international audiences.
Arbitration Hearings
Multi-day arbitration proceedings where consecutive would double the hearing duration.
Why 2-Interpreter Relay Teams Are Mandatory
Simultaneous interpretation is among the most cognitively demanding professional tasks. After 20-30 minutes of continuous output, interpreter accuracy begins to degrade. This is not a question of skill — it is a neurological reality.
That is why international standards mandate 2-interpreter teams who alternate in 20-30 minute shifts. The resting interpreter monitors for errors, prepares terminology, and is ready to take over seamlessly.
We never deploy solo interpreters for simultaneous assignments. If a provider offers you a single interpreter for a full-day conference, they are cutting corners that will cost you accuracy.
Equipment Required
Soundproof Booths
ISO 4043 compliant booths isolate the interpreter from ambient noise and prevent sound leakage.
Infrared Transmitters
Bosch Integrus digital infrared systems for secure, interference-free audio distribution.
Receiver Headsets
Lightweight digital receivers with channel selection for each audience member.
Simultaneous vs Consecutive
Simultaneous
- Real-time, no pauses
- Ideal for large audiences
- Requires equipment (booths, receivers)
- 2-interpreter teams mandatory
- Speed prioritized
Consecutive
- Speaker pauses for interpreter
- Ideal for small groups / courts
- No equipment needed
- Single interpreter possible
- Precision prioritized
Book Simultaneous Interpretation
Contact us to discuss your event requirements. We will recommend the right team size, equipment configuration, and language pairs.