| 摘要 |
PURPOSE:To correct a sound field by obtaining plural correction signals set at different levels and phases from an original signal and adding these correction signal to the original signal. CONSTITUTION:An original signal IN is supplied to delay devices 1.1-1.n respectively, and each delay output is impressed to level controllers 2.1-2.n respectively. Each level control output is used as an input of an adder 4 via inverters 3.1-3.n respectively and superposed on the signal IN. This addition output drives a speaker 5 via a power amplifier 9. The delay time of each delay device and the level attenuation of each level controller are equal to the functions of the routes of the reflected sound and the direct sound. |
