| 摘要 |
PURPOSE:To form a pseudo sound field and to improve the reproducibility of a sound field space by making the input signal itself of a composite tone the output signal of a main channel when the composite tone of a direct sound and an indirect sound is the input signal, separating the input signal in which a phase is rotated from the input signals of the composite tone by using a subchannel and spatially adding during a loud speaking and a reproducing. CONSTITUTION:The subchannel obtains the output signal obtained by separating the component delayed by 180 deg. in phase from the input signals of the signals of the composite tone of the direct sound and the indirect sound obtained by completely reducing an angular frequency omega determined by 1/C4R4. When the subchannel signal is spatially added to the signal of the main channel, a listener spatially listens to the sound passing the main channel, namely the sound of the component in which the phase is delayed 180 deg. from the sound of the same signal as the input signal. Thereby, a biaural image is formed, the directional sense of sound is lightened and the indirect sound near to an original sound field can be formed. |
