| 摘要 |
PURPOSE:To realize the microphone system of comparatively small shape having a sharp directivity with respect to all voice bands. CONSTITUTION:Microphone units 10-17 are arranged on a line. First signal processing means 30, 31 use outputs of the said microphone units 10-17 to implement plural number of subtraction. A 2nd signal processing means 32 uses outputs of the said microphone units 10-17 to delay the signal via delay elements 21-27. A synthesis means 70 synthesizes outputs of the 1st signal processing means 30, 31 via low pass filters 50, 51 and the output of the 2nd signal processing means 32 via a high pass filter 52. Thus, the excellent directivity characteristic is obtained over the entire voice band. |
