| 摘要 |
PURPOSE:To cover all low frequencies including DC, by rotating a fan with the DC component of audio signals to produce wind corresponding to the rotation, and vibrating the fan back and forth conventionally according to the AC components. CONSTITUTION:The fan 1 is vibrated back and forth including a motor with a frame 7 of a voice coil 5 of speaker drive section 3. In Figure, 10 is a signal wave and divided into DC and AC at a circuit 11. The DC signal drives the motor 2 and the AC signal drives the voice coil 5. The circumference of the fan 1 is provided with the frame 8 for the increase in the efficiency. Through the suitable design, e.g., the fan 1 obtains 0-20Hz from the motor 2 and higher frequencies from the voice coil 5. |
