Inductive system
Inductive equipment is an obsolete form of wireless interpreting equipment. It differs from a Infrared system or a radio system by the type of transmission. It is based on the principle of electromagnetic induction. The interpreted sound is transmitted in the Inductive transmitter different carrier frequencies (up to 140 kHz).
An antenna is laid on the floor of the conference room to facilitate the transport of the interpreted word to the Inductive receivers takes over. When routing, make sure that the antenna loop is not too wide so that sufficient transmission is possible. The interpreter consoles can be connected directly to the transmitter.
With the inductive system is possible to transmit up to six languages. It was manufactured, for example, by SONY. In contrast to the Infrared system electromagnetic influences caused, for example, by radio traffic or non-interference-suppressed machines can have a disturbing effect on the transmission quality. Furthermore, the area enclosed by the antenna loop cannot be delimited so precisely that transmission outside this area can also be ruled out. This type of transmission is therefore not unrestrictedly tap-proof.
In the 1980s, a number of venues such as the Cologne Trade Fair or Messe Essen already had permanently relocated Antenna loops embedded in the one or other hall, so that operation was possible at that time without much effort. Nowadays, however, infrared systems and radio systems are preferred.
Advantages of inductive transmission technology are:
- Wireless transmission
- Multi-channel transmission is possible
- High quality intelligible transmission
- In contrast to the infrared system, the transmission is independent of light influences
- Less expensive than infrared technology
Disadvantages of inductive transmission technology are:
- not tap-proof
- time-consuming installation of the temporary antenna loop (technician hours)
- Not sustainable, as hundreds of meters of copper wire and tape are consumed each time
- mediocre audio quality
- Limitation to 6 languages
