| 摘要 |
The present invention relates to a smart foam for active noise control in a duct and a device equipped with the same. In particular, the smart foam for the active noise control in a duct according to the present invention comprises: an external ring (52) made out of an elastic porous synthetic resin foam material of a certain length; an internal ring (54) made out of an elastic porous synthetic resin foam to be inserted into the said external ring (52); a ring type PVDF film (60) to be interposed between the said external ring (52) and the internal ring (54) for the radiation of sounds, on the outer and inner surfaces of which film conductive material layers are plated; and lead wires (64) connecting the conductive material layers (62) on the outer and inner surfaces of the said PVDF film (60) to different electrodes and conveying voltages thereto in order to enable the PVDF film (60) to radiate sounds. Therefore, the smart foam for active noise control in a duct according to the present invention may overcome the drawback of the passive noise control by the conventional elastic porous materials. Furthermore, the present invention, which provides a ring type smart foam, made of the ring type elastic porous synthetic resin foam with a hole in the center containing a PVDF actuator embedded inside, may be installed in a duct with the actual movements of fluid and may achieve the enhanced noise control performance.
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