| 摘要 |
PURPOSE:To facilitate recording outdoor by recording a wind noise of a prescribed level to a sound collection circuit of a microphone automatically to a high pass filter (H.P.F) except a low frequency wind noise when the noise is detected. CONSTITUTION:If the detection level of the wind noise inputted though the detection of a level detector 12 reaches a noise level causing hindrance to sound recording, a changeover switch 4 is thrown to the position of B, the sound signal collected by a microphone 1 is not directly fetched but the sound signal passing through the H.P.F 5 is directly fetched. Then the sound signal passes through the H.P.F 5 to eliminate and suppress the low frequency component being wind noise, the high frequency component of the sound signal is sharpened and sent from the position B of the changeover switch 4 to an amplifier 6. Thus, clear sound recording eliminating wind noise automatically is facilitated. |
