Patent attributes
In an audio transmission system, a control section of a communication conference device emits measurement sound waves from a loudspeaker array to a terminal unit and measures the time until a response is received, thereby detecting the position of the terminal unit. The control section sets directivity characteristics so that microphone sensitivity of the microphone array is brought to point to the position of the terminal unit, and sends the collected audio to another communication conference device. In a communication conference device on the reception side, the directivity characteristic of the loudspeaker array is set so that the received audio appears as if it was emitted from the position of the terminal unit on the transmission side.
