| 摘要 |
a. Method and system of communication with several portable sets functioning simultaneously and at a single frequency as emitter and as receiver. b. Method and system characterised in that, in each set, the transmission part comprises: - a compression circuit 3 between the input transducer 1, 2 of the set and the transmitter 5; - an identification circuit 9 for the set connected to the transmitter 5; - and in the reception part: - an expansion circuit 12 between the receiver 10 and the output transducer 13, 14. c. The invention relates to wireless radio transmissions. <IMAGE>
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