Technical Reference

Glossary of Simultaneous Translation and Equipment

Complete guide to the main terms of simultaneous translation, equipment and modalities. Reference for event organizers in SP.

All the terms you need to know to hire and organize events with simultaneous interpretation.

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A–C

ISO 4043 Booth

Interpretation structure that meets the ISO 4043 standard — an international standard for formal events. 30dB acoustic isolation, space for 2 interpreters and full view of the stage.

Interpretation channel

Transmission frequency dedicated to a language pair. Each language has its own channel — participants select it on the receiver.

Chuchotage

Interpretation mode in which the interpreter whispers the translation directly into the ear of 1–2 people. No equipment, no booth. For very small groups.

Interpreter console

Control panel used by the interpreter in the booth. Allows selecting the channel being listened to, controlling volume and activating the microphone.

D–I

Due diligence

Audit process in M&A transactions. Simultaneous interpretation is essential in the financial, legal and operational sessions of due diligence with international teams.

Pivot language

Intermediate language used in the relay system. Usually English or French. The interpreter of language A interprets into the pivot, and the pivot interpreter interprets into language B.

Infrared (IR)

Audio transmission system by infrared light. High security (does not pass through walls), but requires line of sight between transmitter and receiver.

M–R

Digital radio frequency (RF)

Current wireless transmission system. 150m range, 32 channels, encrypted (AES-128), no line of sight required. lingo standard.

Receiver

Pocket device used by participants to hear the interpretation. With headphones, 10–12h battery.

Relay

Indirect interpretation system for languages with no direct interpreter. E.g.: Arabic→English→Portuguese.

Rotation

Protocol for switching between the pair's two interpreters every 20–30 minutes. Maintains concentration and interpretation quality.

S–Z

Simultaneous

Interpretation mode in which the interpreter converts speech in real time, with a 2–3 second delay. Standard for corporate events, congresses and M&A.

Transmitter

Equipment that receives audio from the booth and transmits it to the participants' receivers.

Whisper interpreting

Synonym of chuchotage. Interpretation whispered into the participant's ear.

How to use this glossary

Whoever organizes a first event with simultaneous interpretation usually meets new vocabulary: channel, relay, rotation, transmitter, ISO booth. This glossary gathers the terms that appear in quotes, contracts and conversations with production, in plain language. It covers modalities, equipment, transmission technologies, event operation and contractual terms.

The term list above follows alphabetical order. The sections below group the same concepts by theme and add other frequently used terms. For the technical glossary of vocabulary by sector, with terms in several languages, see the technical glossary of simultaneous interpretation.

Interpretation modes

Equipment and components

The details of each component and of what a rental includes are in simultaneous interpretation equipment rental in SP, and the most common questions on the topic, in the equipment FAQ.

Transmission technologies

A fuller explanation of these technologies, with a comparison, is in wireless equipment for simultaneous interpretation.

Event operation

For the preparation step by step, see how to prepare your event and the congress interpretation checklist.

Contractual and service terms

lingo was founded by Alex Barros, a simultaneous interpreter with 21 years of experience. To understand how the price is built, see how much simultaneous interpretation costs in SP.

Event format terms

Knowing the event format helps define the team and equipment. For events with several rooms, the guide to equipment rental for large events in SP covers planning by scale.

Classification of an interpreter's languages

In the conference interpreting market, an interpreter's languages are usually classified in three groups. Language A is the mother tongue or equivalent, into which the interpreter works with full naturalness. Language B is an active language, which the interpreter masters well enough to interpret into. Language C is a passive language, which the interpreter understands but does not interpret into.

This classification helps explain why relay exists: when no interpreter has the source language as C and the target as A, the bridge is made through a pivot language. When hiring, state the source and output languages, and the team indicates whether the combination is direct or requires relay.

Common acronyms and abbreviations

Did not find the term? The technical glossary covers sector vocabulary, and the lingo team explains any term in a quote before hiring.

Frequently asked questions

What is the difference between simultaneous and consecutive interpretation?

In simultaneous, the interpreter translates in real time, from a booth, and the audience listens through receivers. In consecutive, the speaker pauses and the interpreter translates after each segment, which doubles session time.

What is relay in simultaneous interpretation?

It is the indirect interpretation used when there is no direct interpreter between two languages. One interpreter translates into the pivot language, usually English or French, and another translates from the pivot into the final language.

Why do interpreters work in pairs?

Simultaneous interpretation requires intense concentration. In sessions over 2 hours, the pair alternates every 20 to 30 minutes to maintain quality.

What is an interpretation channel?

It is the frequency dedicated to a language. Each output language has its own channel, and the participant chooses on the receiver the channel of the language they want to hear.

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