Abstract: 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.

Abstract: 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.