| 摘要 |
PROBLEM TO BE SOLVED: To resolve random components and degree components with sufficient resolution in small circuit scale and by small operand with respect to a simulation system of car interior sound which simulates car interior sound and a degree component removing filter which is suitable for the simulation system of car interior sound. SOLUTION: The simulation system of car interior sound is provided with the degree component removing filter 300 which has a variable delay section 31 for delaying a sound signal by delay amount corresponding to a control signal, a signal subtract section 32 which subtracts sound signal after being delayed by the variable delay section 31 from sound signal before being delayed by the variable delay section and a delay control section 33 producing a control signal for controlling the delay amount of the variable delay section 31 based on rotation speed of a rotator so that random component from which the degree component due to rotation of the rotator is removed can be obtained and conveying the control signal to the variable delay section 31. COPYRIGHT: (C)2004,JPO
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