Simultaneous interpretation equipment — complete rental with technical operator

How the interpretation system with equipment works

The in-person simultaneous interpretation system has four parts working together: the booth, where the interpreter listens to the speaker and speaks the translation; the transmitter, which sends the interpreted audio by UHF radio; the individual receivers, with headphones and a channel selector; and the technical operator, who installs, tests and monitors everything during the event. Each language occupies a channel, and the participant chooses theirs on the receiver itself.

The speaker's audio reaches the booth through a connection to the venue's sound system, so the interpreter hears the same feed as the audience, only isolated from room noise. The interpreter's voice goes to the transmitter and from there to the receivers. The whole path happens in real time, with a delay of a few seconds, and without the speaker having to interrupt their speech.

This format is the standard at congresses, board meetings, shareholder meetings, training sessions and corporate events with participants of several languages. It does not require internet for the interpreted audio, which makes it stable even in halls with a congested network.

UHF receivers: what to look for

UHF receivers are the equipment the participant uses, so the experience of the whole event depends on them. lingo's devices are compact, with headphones and a channel selector, and have battery for more than 8 hours of event. They are supplied in batches of 10 to 2,000 units, covering everything from a board meeting to a large-scale congress.

When sizing the quantity, consider that not every participant uses a receiver, but everyone should have access to one. The practice is to reserve receivers for all guests who do not speak the main language, plus a margin for the unexpected. At the event entrance, organized distribution, with the language of each channel identified, avoids queues and delays at the start of the program.

On return, the receivers are collected and checked by the team. Agreeing in advance on the delivery and collection point, and on who is responsible for guiding participants, simplifies the operation.

Portable soundproof booth

The portable booth is set up in the event room and acoustically isolates the interpreter, who needs to hear the speaker clearly and speak without being heard by the audience. It measures 1.2 m × 1.2 m × 1.8 m and holds 1 or 2 interpreters. At long events, the pair of interpreters works in rotation inside the booth, so space, ventilation and a view of the stage are part of the planning.

The ideal position has a direct view of the speaker and the presentation screen, preferably at the back or side of the room, without blocking exits. When the venue has a fixed booth, lingo works integrated with it; when it does not, the portable booth solves it with quick installation.

UHF transmitter and distribution rack

The transmitter sends the interpreted audio signal to all receivers. In large rooms or at events with several simultaneous rooms, distribution racks extend the range and organize channels by language. All setup and signal testing are part of the service, and the technical operator monitors reception throughout the event.

When there are several languages, each has its own channel. At events with parallel rooms, frequency planning avoids interference between them. This is one of the reasons why equipment rental is delivered with a technical operator, and not just as a rental of devices.

Technical operator: why it makes a difference

With every equipment rental, lingo includes a technical operator who installs, tests and monitors the system during the event. The operator coordinates with the venue's audio and video team, adjusts sound levels, solves signal problems in real time and helps participants with the receivers. For the organizer, this means a single technical point of contact and less risk of failures that interrupt the program.

The quality of the input audio is decisive for interpretation. A microphone close to the speaker's mouth, with clean sound and no feedback, improves the accuracy of the interpreter's work. The operator takes care of this integration before the opening, running a sound check with the speakers when possible.

How to choose the equipment for your event

The choice starts with three questions: how many participants will need translation, how many languages will be used and how long the program lasts. For 10 participants or more, the UHF system is already justified; below that, remote interpretation via Zoom is usually more efficient. More languages mean more channels and more booths, and long events call for a pair of interpreters per language.

The format of the venue, the presence of its own sound system, the number of rooms and the need for hybrid transmission also come into play. If the event has an in-person and a remote audience, both formats run in parallel, with the same interpreter serving both audiences. lingo helps size everything from a few pieces of information: date, location, languages and number of participants.

Lead times, freight and invoicing

For events in São Paulo, we recommend requesting the equipment 72 hours in advance. For other cities, 5 to 7 days allow freight logistics to be organized. In Greater São Paulo, freight is included in the quote; outside it, round-trip freight is itemized separately.

Equipment rental is invoiced under CNAE 77.39-0-99 of Lingo Qi Interpretações LTDA (CNPJ 53.834.741/0001-34), with an electronic invoice. The quote comes out in 60 seconds via WhatsApp or the calculator at lingo.com.br/orcamento, with equipment, technical operator and logistics described, with no hidden items.

Equipment with or without an interpreter

The rental can be contracted with or without a lingo interpreter. If the client already has their own human interpreter, lingo supplies only the equipment and the technical operator. If you prefer a complete service, Alex Barros and lingo's network of interpreters take care of the interpretation and the system as a single package, with one quote and one party responsible for delivery.

To understand the options better, see the pages on equipment rental, how to choose equipment and the dedicated FAQ, which detail prices, lead times and use cases by event type.

Common mistakes when hiring interpretation equipment

The most frequent mistake is hiring the equipment without considering the venue's audio. If the hall's sound system does not deliver a clean feed to the booth, the interpreter works with a poor signal and quality drops, however good the equipment. Another mistake is undersizing the number of receivers, which forces participants to share devices and interrupts the experience.

There is also the habit of leaving the decision until the eve. Even with a minimum lead time of 72 hours in São Paulo, the earlier the event is confirmed, the more time there is for a site visit, a sound check and alignment with the venue's team. Finally, it is worth avoiding confusion between equipment and service: renting devices without a technical operator shifts to the organizer the responsibility of solving failures during the event.

Hybrid events and events with several rooms

At hybrid events, the in-person audience uses the UHF receivers while the remote audience chooses the language on the videoconferencing platform. The same interpreter can serve both audiences, and the technical operator bridges the room audio and the broadcast. This arrangement requires audio planning, because the capture must serve the booth, the audience and the broadcast at the same time.

At congresses with parallel rooms, each room has its own set of booth, transmitter and channels, with frequencies organized to avoid interference. The number of technical operators follows the number of rooms, and the distribution of receivers is designed so that each participant uses the device in the room they are in.

Quick equipment glossary

Booth: isolated space where the interpreter works. Receiver: individual device with headphones and a channel selector. Transmitter: sends the interpreted audio by UHF radio. Distribution rack: organizes and extends the signal at large events. Channel: frequency dedicated to each language. Technical operator: professional who installs, tests and monitors the system. RSI: remote simultaneous interpretation, with no physical equipment.

Knowing these terms helps you read supplier proposals and compare items fairly. Two proposals with the same price can have different scopes, and the difference usually lies in the presence of the technical operator, the number of receivers and freight.

Related services

For details on prices and lead times, see the page on simultaneous interpretation equipment rental. To choose the right system, read the guide how to choose equipment. Specific questions are in the equipment FAQ, and the in-person interpretation service is described in in-person simultaneous interpretation.