| 摘要 |
PURPOSE:To select a desired signal regardless of the movement of a desired signal source or noise source by delaying respective outputs of plural microphone elements differentially with time, and summing up and outputting those delayed signals from a load summing means. CONSTITUTION:The multipoint sound reception part 1 consisting of plural microphone elements 11-1n is connected to an addition part 3 consisting of a delay circuit 2 and adding circuits 31-3n. The output of the delay circuit 2 is connected to a load addition part 4. A virtual target signal generator 5 is provided, its output side is connected to a delay circuit 6 consisting of virtual target signal delay circuits 61-6n, and the output side of the delay circuit 6 is connected to the addition part 3. The output side of the addition part 3 is connected to a delay circuit 7, whose output side is connected to a load coefficient decision part 8. The output side of the virtual target signal generator 5 is connected to the load coefficient decision part 8 through a delay element 9, and the load coefficient decision part 8 is connected to the addition part 4. |
