| 摘要 |
Telecommunication apparatus including means for transmitting 3 and receiving 4 radar waves, a microphone 9 and a loudspeaker 10 as well as their associated electronic circuits, respectively for converting into radio waves on transmission audible sounds picked up by the microphone 9 and for converting the radio waves on reception into audible sounds broadcast by the loudspeaker 10, and control means, essentially consisting of a device 1 with automatic operation, responsive to the existance of vocal sounds picked up by the microphone, in order to transfer the apparatus from a reception mode of operation to a transmission mode of operation. <IMAGE>
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