1- Radiofrequency sound systems (RF): This is equipment that conveys sounds over FM waves. It is a cost-effective solution that uses wireless transmissions received by the event participants tuning to its channel. The system is recommended for huge events to transmit through walls and sometimes in open areas.
Radio-frequency transmission is not a new technology; however, it is the most common as it is the most powerful with the largest coverage range.
RF configuration comprises one to three transmitters and at least one receiver, depending on the area to be covered. The transmitter, connected to an audio source – to a microphone system, so, it picks up the audio signals and transmits them wirelessly to the receivers.
RF is usually used in lectures and seminars, tour guides, and open-air events.
With several channels, RF is especially recommended in the case of simultaneous interpreting into different languages.
2- Infrared sound systems (IR): This provides coverage over a large area allowing delegates to be mobile with the help of cordless infra-red receiver and headsets. The transmission is distributed from a number of infrared radiators installed around a room depending on the number of channels to be transmitted, the size of the area to be covered, and the texture and color of the walls. It is the best solution in case discussions are confidential.