Short definition
ISO 20109:2016 sets the requirements for equipment used in simultaneous interpreting – interpreter consoles, microphones, headphones, and related technology.
Detailed explanation
While ISO 20108 describes signal quality, ISO 20109 governs the devices that deliver and use that quality. The standard, "Equipment – Requirements," is aimed at manufacturers, rental companies, and technical staff. It sets requirements for the overall system's sound fidelity, the functions and dimensions of interpreter consoles, and the headphones and microphones interpreters use.
An important aspect is hearing protection: consoles and headphones must protect interpreters from sudden, harmful volume spikes – an occupational health issue, since interpreters work with headphones all day. Annexes to the standard also address accessibility and booth furniture. ISO 20109 only works in combination: the full requirements picture emerges only together with ISO 20108 (quality) and ISO 2603/4043 (booths).
Relevance in this subject area
This standard addresses the question "Is the equipment good enough?" It safeguards not only audio quality but also interpreters' health.
Practical example
For a conference, a rental company chooses interpreter consoles with hearing-protection limiting under ISO 20109 – so an unexpected microphone feedback can't harm the interpreters.
Related terms
ISO 20108, Interpreter console, Interpreting system, ISO 2603, ISO 4043