| 摘要 |
PURPOSE:To obtain a high direct sound and a reverberation sound ratio and to improve the articulation of a sound field by using plural microphones so as to synthesize the direct sounds from a sound source so that they are in phase, synthesizing the reverberation sound with no correlation, using plural speakers so as to reproduce the sound with similar relation between the direct sound and the reverberation sound. CONSTITUTION:On a circle 5 whose radius is r1 around a talker 1 as a sound source in a conference room A, n-sets of microphones M1-Mn are arranged at an equal interval. The interval among the microphones M1-Mn is selected to be an interval at which a reverberation sound in the conference room A is regarded to have no correlation, that is, to be 1/2 of a maximum wavelength of the reverberation sound or over. Outputs from the microphones M1-Mn are synthesized by a synthesis circuit 4 and the result is fed to a transmission line 2. Speakers S1-Sn are arranged at an equal interval on a circle 6 whose radius is r2 around a listener (a position to which a listener is to be located) 3 in a conference room B. The interval among the speakers S1-Sn is selected to be an interval at which the reverberation sound in the conference room B is regarded to have no correlation, that is, to be 1/2 of a maximum wavelength of the reverberation sound or over. A signal from the transmission line 2 is distributed to the speakers S1-Sn. |
