| 摘要 |
PROBLEM TO BE SOLVED: To facilitate hearing of voices of each speaker in a telephone conference system by transmitting voice signals collected by microphones prepared in the number equal to the opposite communication parties to a communication circuit after adding identification data proper to each microphone to those voice signals and also reproducing received voice signals via a speaker to produce the voice signals in sound fields of different phases for each added indentification data. SOLUTION: A conference is held by means of plural telephones and four terminal devices A to D which are connected to each other via a telephone circuit network 1. The devices A to D have identification numbers 01, 02, 03 to 03, 05 and 06 at identification number processing parts 4a, 4b, 4c to 4j, 4k and 4l respectively and transmit voice signals collected by three pairs of microphones 7a, 7b, 7c to 7j, 7k and 7l after adding the numbers 01, 02, 03 to 03, 05 and 06 to those voice signals. Meanwhile, the voice signals having the numbers 01, 02, 03 to 03, 05 and 06 are selected at the parts 4a, 4v, 4c to 4j, 4k and 4l and then outputted via the speakers 6a, 6b, 6c to 6j, 6k and 6l respectively. |
