Short definition
An interpreting booth is the soundproofed workspace for simultaneous interpreters – either permanently built into a building (fixed) or a mobile booth for temporary setup (transportable).
Detailed explanation
The booth is the heart of simultaneous interpreting: it acoustically separates interpreters from the hall and from each other so the languages don't interfere with one another, while providing a clear view of speakers and screen. Typically, two to three interpreters work inside, alternating; sufficient space, ventilation, and glare-free lighting are mandatory.
There are two construction types, each with its own standard: fixed booths under ISO 2603 are permanently integrated into conference rooms, while mobile booths under ISO 4043 are set up for each event and must be assembled repeatedly. Both standards set requirements for sound insulation, sound absorption, dimensions, ventilation, and sightlines. It's important to distinguish these from makeshift table setups: only a full-fledged booth meets the acoustic requirements for multiple parallel languages.
Relevance in this subject area
Without a standard-compliant booth, clean simultaneous interpreting with multiple languages isn't possible. It's the central structural prerequisite for any multilingual in-person conference.
Practical example
For a congress in a hotel without fixed booths, four mobile ISO 4043 booths are set up – with a clear view of the stage and clean acoustic separation between the languages.
Related terms
ISO 2603, ISO 4043, Sound insulation, Interpreter console, Simultaneous interpreting